İnceleme: Lenovo Yoga C940-14IIL, yenilmesi zor müşteri dönüştürülebilir modeli
14 inç Yoga C940, geçen yılki 13.9 inç Yoga C930'un doğrudan ardılı. Ekran boyutundaki küçük yumru dışında, yeni model, burada FHD SKU'yu ilk incelememizde ayrıntılı olarak açıklandığı gibi bir dizi küçük değişiklik getiriyor. Bu inceleme, FHD ve 4K seçenekleri arasında ne tür iyileştirmeler veya farklılıklar bekleyebileceğimizi görmek için 4K UHD SKU'ya odaklanacak. Ekran farklılıklarından başka, 4K SKU'muzla ilgili her şey FHD SKU ile aynı kalıyor ve bu yüzden kontrol etmenizi öneririz şasi ve özellikleri hakkında daha fazla bilgi edinmek için mevcut incelememizi inceleyin. Yoga C940'ın 15.6 inçlik sürümü daha hızlı Core H serisi CPU'lar ve GeForce Max-Q grafikleriyle de kullanılabilir. 14 inç Yoga C940, HP Spectre x360 13, Dell XPS 13 gibi diğer amiral gemisi alt defterleri ve dönüştürülebilirleriyle doğrudan rekabet eder 7390 2'si 1 arada, Asus ZenBook Flip 14 ve Microsoft Surface Book serisi.Daha fazla Lenovo yorumu: Lenovo Yoga C940-14 (FHD) Lenovo Yoga C940-15Lenovo Yoga C930Lenovo ThinkPad P53Lenovo Legion Y740
Rating | Date | Model | Weight | Height | Size | Resolution | Price |
|---|---|---|---|---|---|---|---|
| 87 % v7 (old) | 12/2019 | Lenovo Yoga C940-14IIL 81Q9 i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU) | 1.4 kg | 15.7 mm | 14.00" | 3840x2160 | |
| 86.3 % v7 (old) | 10/2019 | Dell XPS 13 7390 2-in-1 Core i7 i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU) | 1.3 kg | 13 mm | 13.40" | 1920x1200 | |
| 87.6 % v6 (old) | 05/2018 | Huawei Matebook X Pro i5 i5-8250U, GeForce MX150 | 1.3 kg | 14.6 mm | 13.90" | 3000x2000 | |
| 85.2 % v7 (old) | 12/2019 | MSI Prestige 15 A10SC i7-10710U, GeForce GTX 1650 Max-Q | 1.7 kg | 16 mm | 15.60" | 3840x2160 | |
| 86.3 % v7 (old) | 10/2019 | Razer Blade Stealth i7-1065G7 Iris Plus i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU) | 1.4 kg | 15.3 mm | 13.30" | 1920x1080 |
Durum
İletişim
Intel AX201, Wi-Fi 6 bağlantısının, Wi-Fi 6 uyumlu bir yönlendiriciniz varsa Wi-Fi 5'in aktarım hızlarının iki katından daha fazlasını sunmasını sağlar. AX201 işlevsel olarak AX200 ile aynıdır ancak bazı donanım değişiklikleri vardır.
| Networking | |
| iperf3 transmit AX12 | |
| MSI Prestige 15 A10SC | |
| Lenovo Yoga C930-13IKB 81C4 | |
| Asus ZenBook S13 UX392FN | |
| iperf3 receive AX12 | |
| MSI Prestige 15 A10SC | |
| Asus ZenBook S13 UX392FN | |
| Lenovo Yoga C930-13IKB 81C4 | |
Bakım
Alt panel T5 Torx vidalarla sabitlenmiştir ve şasiye zarar vermeden çıkarılması çok zordur. Keskin kenarlar keskin bir kenarla bile çok sıkıdır ve son kullanıcı için düşmanca servis sağlar.
Görüntüle
Yerel 4K UHD çözünürlüğe sahip 14 inç ekranlar nadirdir ve bu nedenle bu Lenovo'daki BOE HF NV140QUM-N54 IPS panelinin şu ana kadar veritabanımızda başka hiçbir dizüstü bilgisayarda bulunmaması şaşırtıcı değildir. Bununla birlikte, panel diğer Ultrabook'ların çoğunda daha yaygın olan Sharp, AU Optronics veya LG Philips panellerine kıyasla daha iyi bir şekilde karşılaştırır. Kontrast gibi temel özellikler, derin renkler, net metinler ve makul yanıt süreleri ile 1500: 1'den fazla mükemmeldir. Tek büyük şikayetimiz, HP EliteBook 1040 G5'te 120 Hz ile karşılaştırıldığında 60 Hz yenileme hızı ile sınırlı olmasıdır. Belki de ekranın en önemli özelliği parlaklığıdır. Lenovo, hem FHD hem de 4K UHD SKU'ları için 500 nit talep ederken, FHD test birimimizde sadece 384 nit ölçebildik. Neyse ki, bu 4K UHD birimi, Lenovo'nun geçen yılki Yoga C930'un çok üstünde ve rakip XPS 13 7390 2'si 1 arada ile eşit olduğunu iddia ettiği kadar parlak.
| |||||||||||||||||||||||||
Aydınlatma: 82 %
Batarya modunda parlaklık: 501.7 cd/m²
Kontrast: 1568:1 (Siyah: 0.32 cd/m²)
ΔE Color 5.48 | 0.5-29.43 Ø4.91, calibrated: 2.22
ΔE Greyscale 8.1 | 0.5-98 Ø5.2
100% sRGB (Argyll 1.6.3 3D)
74.1% AdobeRGB 1998 (Argyll 1.6.3 3D)
83.3% AdobeRGB 1998 (Argyll 2.2.0 3D)
99.9% sRGB (Argyll 2.2.0 3D)
83.8% Display P3 (Argyll 2.2.0 3D)
Gamma: 2.07
| Lenovo Yoga C940-14IIL 81Q9 BOE HF NV140QUM-N54, IPS, 14", 3840x2160 | Lenovo Yoga C930-13IKB 81C4 AUO B139HAN03_0, IPS, 13.9", 1920x1080 | Lenovo Yoga C940-14IIL LP140WF9-SPE2, IPS LED, 14", 1920x1080 | Dell XPS 13 7390 2-in-1 Core i7 Sharp LQ134N1, IPS, 13.4", 1920x1200 | Razer Blade Stealth i7-1065G7 Iris Plus Sharp LQ133M1JW41, IPS, 13.3", 1920x1080 | Asus ZenBook S13 UX392FN Tianma XM, IPS, 13.9", 1920x1080 | |
|---|---|---|---|---|---|---|
| Display | -18% | -14% | -11% | -14% | -13% | |
| Display P3 Coverage | 83.8 | 62.7 -25% | 66 -21% | 69.9 -17% | 66.2 -21% | 67.5 -19% |
| sRGB Coverage | 99.9 | 92.6 -7% | 97.9 -2% | 99.2 -1% | 97.2 -3% | 95.8 -4% |
| AdobeRGB 1998 Coverage | 83.3 | 64.7 -22% | 67.3 -19% | 71.5 -14% | 67.1 -19% | 69 -17% |
| Response Times | 15% | -11% | -7% | -12% | 2% | |
| Response Time Grey 50% / Grey 80% * | 44.4 ? | 34.4 ? 23% | 49.6 ? -12% | 47.6 ? -7% | 45.2 ? -2% | 47.2 ? -6% |
| Response Time Black / White * | 27.2 ? | 25.6 ? 6% | 30 ? -10% | 29.2 ? -7% | 33.2 ? -22% | 24.8 ? 9% |
| PWM Frequency | 2500 ? | 22730 ? | ||||
| Screen | -25% | 19% | 19% | 20% | 16% | |
| Brightness middle | 501.7 | 312 -38% | 384 -23% | 549.8 10% | 422.6 -16% | 466 -7% |
| Brightness | 501 | 295 -41% | 363 -28% | 520 4% | 404 -19% | 462 -8% |
| Brightness Distribution | 82 | 87 6% | 90 10% | 86 5% | 87 6% | 90 10% |
| Black Level * | 0.32 | 0.43 -34% | 0.17 47% | 0.39 -22% | 0.35 -9% | 0.33 -3% |
| Contrast | 1568 | 726 -54% | 2259 44% | 1410 -10% | 1207 -23% | 1412 -10% |
| Colorchecker dE 2000 * | 5.48 | 7.6 -39% | 3.5 36% | 2.12 61% | 1.02 81% | 1.93 65% |
| Colorchecker dE 2000 max. * | 10.03 | 15.06 -50% | 5.5 45% | 3.66 64% | 3.06 69% | 4.26 58% |
| Colorchecker dE 2000 calibrated * | 2.22 | 1.96 12% | 1 55% | 1.37 38% | 0.95 57% | 1.99 10% |
| Greyscale dE 2000 * | 8.1 | 8.8 -9% | 4.6 43% | 2.6 68% | 1 88% | 1.7 79% |
| Gamma | 2.07 106% | 2.01 109% | 2.32 95% | 2.3 96% | 2.21 100% | 2.15 102% |
| CCT | 6730 97% | 6874 95% | 6884 94% | 6884 94% | 6502 100% | 6382 102% |
| Color Space (Percent of AdobeRGB 1998) | 74.1 | 59.1 -20% | 62 -16% | 65.4 -12% | 62.1 -16% | 62.2 -16% |
| Color Space (Percent of sRGB) | 100 | 92.3 -8% | 97.7 -2% | 99.7 0% | 97.1 -3% | 95.7 -4% |
| Total Average (Program / Settings) | -9% /
-19% | -2% /
9% | 0% /
10% | -2% /
9% | 2% /
9% |
* ... smaller is better
Tam AdobeRGB kapsamının mümkün olduğu Sharp IGZO panelleri kadar geniş olmasa da, renk alanı FHD panelinden daha geniş (yüzde 74'e karşılık yüzde 62 AdobeRGB). Yoga C940 SKU'sundan bağımsız olarak tam sRGB kapsama alanı sağlandığından, biraz daha derin renkler günlük kullanımı önemli bir şekilde etkilemez.
X-Rite kolorimetresi ile yapılan diğer ölçümler, aşırı sıcak bir renk sıcaklığı ve kutunun dışında zayıf RGB dengesini ortaya çıkarır, bu da panelin daha doğru renkler yapabileceğini biliyoruz. Ekranı kendimiz kalibre etmek hem gri tonlamayı hem de renkleri sırasıyla 8.1 ve 5.48 ortalama DeltaE değerlerinden sırasıyla 0.8 ve 2.22'ye önemli ölçüde geliştirir. Dizüstü bilgisayardan en iyi şekilde yararlanmak için ekranı kalibre etmenizi veya yukarıdaki ICM profilimizi uygulamanızı öneririz.
Display Response Times
| ↔ Response Time Black to White | ||
|---|---|---|
| 27.2 ms ... rise ↗ and fall ↘ combined | ↗ 15.6 ms rise |  |
| ↘ 11.6 ms fall | ||
| The screen shows relatively slow response rates in our tests and may be too slow for gamers. In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 66 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (20.9 ms). | ||
| ↔ Response Time 50% Grey to 80% Grey | ||
| 44.4 ms ... rise ↗ and fall ↘ combined | ↗ 22.4 ms rise |  |
| ↘ 22 ms fall | ||
| The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.165 (minimum) to 636 (maximum) ms. » 73 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (32.8 ms). | ||
Screen Flickering / PWM (Pulse-Width Modulation)
| Screen flickering / PWM not detected |  | ||
In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8710 (minimum: 5 - maximum: 343500) Hz was measured. | |||
4K test ünitemiz, daha iyi dış mekan arkadaşı olmak için son FHD ünitemizden daha parlaktır. Yine de, parlak ekran nedeniyle doğrudan güneş ışığından kaçınmak ve yazı tipi ölçeklendirmesini artırmak en iyisidir. Dönüştürülebilir açık havada sık sık kullanmak istiyorsanız 1000 nit HP EliteBook veya Dragonfly'i düşünün. Görüş açıları, bir IPS panelinde olduğu gibi geniştir. Portre modundayken daha büyük 15,6 inç Yoga C940'a kıyasla renklerin ve parlaklığın daha kararlı olduğunu unutmayın.
Verim
CPU ve RAM FHD SKU'muzla aynı kalırken, bazı 3DMark sorunlarını çözmek için Intel grafik sürücüsünü 25.20.100.7014 DCH olarak güncelledik. Bu nedenle, bu sefer 25 W Core i7-1065G7'nin ham performansının daha eksiksiz bir resmini çizebiliyoruz.
İşlemci
İşlemci performansı en çok son nesil Core i7-8565U veya mevcut Zen Ryzen 7 3700U'ya benziyor, çünkü Ice Lake ham CPU performansı yerine gen-gen GPU iyileştirmelerine odaklanıyor. Ancak, performans sürdürülebilirliği biraz daha iyi olabilir; CineBench R15 Multi-Thread'ı bir döngüde çalıştırırken, puanlar yüzde 18'lik bir performans düşüşünü temsil etmek için zamanla 750 puandan 615 puana kadar düşecektir. Sonuçlar hala Razer Blade Stealth GTX 1650 Max-Q'da bulunan aynı CPU'nun 15 W sürümünden çok daha iyi. Daha fazla teknik bilgi ve kıyaslama için Core i7-1065G7'deki özel sayfamıza bakın.
| Cinebench R20 | |
| CPU (Single Core) | |
| MSI Prestige 15 A10SC | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Average Intel Core i7-1065G7 (358 - 474, n=31) | |
| MSI PS63 Modern 8SC | |
| Lenovo Yoga C940-15IRH | |
| Lenovo Legion Y540-17IRH | |
| Dell G5 15 5590 | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Lenovo ThinkPad L590-20Q70019GE | |
| Dynabook Portege A30-E-174 | |
| Dell Latitude 14 5495 | |
| Dell Latitude 13 3390 | |
| Dell Inspiron 15 5000 5585 | |
| CPU (Multi Core) | |
| Dell G5 15 5590 | |
| Lenovo Yoga C940-15IRH | |
| MSI Prestige 15 A10SC | |
| Lenovo Legion Y540-17IRH | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| MSI PS63 Modern 8SC | |
| Average Intel Core i7-1065G7 (1081 - 2024, n=31) | |
| Dell Inspiron 15 5000 5585 | |
| Dell Latitude 14 5495 | |
| Lenovo ThinkPad L590-20Q70019GE | |
| Dynabook Portege A30-E-174 | |
| Dell Latitude 13 3390 | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Cinebench R15 | |
| CPU Single 64Bit | |
| MSI Prestige 15 A10SC | |
| Lenovo Yoga C940-15IRH | |
| MSI PS63 Modern 8SC | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Average Intel Core i7-1065G7 (141 - 190, n=35) | |
| Lenovo Legion Y540-17IRH | |
| Dell G5 15 5590 | |
| Lenovo ThinkPad L590-20Q70019GE | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Dynabook Portege A30-E-174 | |
| Dell Latitude 14 5495 | |
| Dell Latitude 13 3390 | |
| Dell Inspiron 15 5000 5585 | |
| CPU Multi 64Bit | |
| Lenovo Yoga C940-15IRH | |
| Dell G5 15 5590 | |
| MSI Prestige 15 A10SC | |
| Lenovo Legion Y540-17IRH | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| MSI PS63 Modern 8SC | |
| Dell Inspiron 15 5000 5585 | |
| Dell Latitude 14 5495 | |
| Average Intel Core i7-1065G7 (288 - 836, n=36) | |
| Dell Latitude 13 3390 | |
| Lenovo ThinkPad L590-20Q70019GE | |
| Dynabook Portege A30-E-174 | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Cinebench R11.5 | |
| CPU Single 64Bit | |
| Average Intel Core i7-1065G7 (2.09 - 2.17, n=4) | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Dell Latitude 13 3390 | |
| Dell Inspiron 15 5000 5585 | |
| CPU Multi 64Bit | |
| Dell Inspiron 15 5000 5585 | |
| Average Intel Core i7-1065G7 (5.69 - 9.37, n=4) | |
| Dell Latitude 13 3390 | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Cinebench R10 | |
| Rendering Multiple CPUs 32Bit | |
| Dell G5 15 5590 | |
| Lenovo Legion Y540-17IRH | |
| Average Intel Core i7-1065G7 (16551 - 26481, n=4) | |
| Dynabook Portege A30-E-174 | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Rendering Single 32Bit | |
| Average Intel Core i7-1065G7 (7083 - 7390, n=4) | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Lenovo Legion Y540-17IRH | |
| Dell G5 15 5590 | |
| Dynabook Portege A30-E-174 | |
| wPrime 2.10 - 1024m | |
| Dell XPS 13 7390 2-in-1 Core i3 | |
| Average Intel Core i7-1065G7 (233 - 354, n=3) | |
* ... smaller is better
Sistem performansı
PCMark sonuçları, doğal çözünürlük farklılıklarına rağmen son Yoga C940'ımızla özdeştir.
| PCMark 8 Home Score Accelerated v2 | 3448 puan | |
| PCMark 8 Work Score Accelerated v2 | 4382 puan | |
| PCMark 10 Score | 4633 puan | |
Yardım | ||
Storage Devices
Whereas our Yoga C940 FHD SKU comes equipped with a 512 GB Samsung PM981, our Yoga C940 4K SKU comes with the larger 1 TB version. Performance is otherwise very similar between them with average sequential read and write rates reaching more than 2200 MB/s and 1200 MB/s each, respectively. See our table of HDDs and SSDs for more comparisons between drives.
| Lenovo Yoga C940-14IIL 81Q9 Samsung PM981a MZVLB1T0HBLR | Lenovo Yoga C930-13IKB 81C4 SK hynix PC401 HFS256GD9TNG | Lenovo Yoga C940-14IIL Samsung SSD PM981 MZVLB512HAJQ | Dell XPS 13 7390 2-in-1 Core i7 Toshiba BG4 KBG40ZPZ512G | Razer Blade Stealth i7-1065G7 Iris Plus Samsung SSD PM981 MZVLB256HAHQ | Asus ZenBook S13 UX392FN WDC PC SN520 SDAPNUW-512G | |
|---|---|---|---|---|---|---|
| AS SSD | -162% | 3% | -74% | -45% | -15% | |
| Seq Read | 2213 | 1228 -45% | 2525 14% | 1801 -19% | 1989 -10% | 1224 -45% |
| Seq Write | 1401 | 544 -61% | 1253 -11% | 1125 -20% | 827 -41% | 907 -35% |
| 4K Read | 55.2 | 39.16 -29% | 59.1 7% | 39.7 -28% | 40.12 -27% | 41.46 -25% |
| 4K Write | 130.3 | 106.5 -18% | 134.1 3% | 67 -49% | 135.1 4% | 126.2 -3% |
| 4K-64 Read | 878 | 466.4 -47% | 1010 15% | 1253 43% | 531 -40% | 1021 16% |
| 4K-64 Write | 1478 | 305.1 -79% | 1461 -1% | 209 -86% | 309.9 -79% | 1251 -15% |
| Access Time Read * | 0.036 | 0.46 -1178% | 0.052 -44% | 0.069 -92% | 0.085 -136% | 0.053 -47% |
| Access Time Write * | 0.086 | 0.51 -493% | 0.029 66% | 0.625 -627% | 0.09 -5% | 0.027 69% |
| Score Read | 1154 | 628 -46% | 1322 15% | 1472 28% | 770 -33% | 1185 3% |
| Score Write | 1748 | 466 -73% | 1721 -2% | 388 -78% | 528 -70% | 1468 -16% |
| Score Total | 3467 | 1394 -60% | 3670 6% | 2583 -25% | 1644 -53% | 3250 -6% |
| Copy ISO MB/s | 2161 | 628 -71% | 2016 -7% | 1293 -40% | 1418 -34% | 1404 -35% |
| Copy Program MB/s | 572 | 540 -6% | 542 -5% | 560 -2% | 382.7 -33% | 402.4 -30% |
| Copy Game MB/s | 1433 | 533 -63% | 1278 -11% | 927 -35% | 334.2 -77% | 902 -37% |
* ... smaller is better
GPU Performance
As mentioned before, 3DMark benchmarks paint a very different picture from real-world gaming performance. While 3DMark scores are within single-digit percentage points of the Radeon RX Vega 10 and about 20 to 27 percent behind the GeForce MX250, performance in games can vary wildly. Shadow of the Tomb Raider, for example, is 30 to 40 percent slower than the RX Vega 10 and MX250 while frame rates in Rocket League are more comparable. If you plan on doing any gaming at all, then your best bet is to stick with undemanding titles like Rocket League, Fortnite, or LoL where performance will be more reliable.
Performance will always be significantly faster than the last generation UHD Graphics 620 that the Ice Lake series replaces by at least 2x in most cases.
See our dedicated page on the Iris Plus G7 for more benchmark comparisons.
| 3DMark 11 | |
| 1280x720 Performance GPU | |
| Asus Zephyrus S GX531GM | |
| Asus ZenBook 15 UX534FT-DB77 | |
| MSI GL62M 7RD-077 | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Huawei MateBook 14 KLV-W29 | |
| Microsoft Surface Laptop 3 15 Ryzen 5 3580U | |
| Asus VivoBook 15 X512FL-EJ205T | |
| Dell Inspiron 15 5000 5585 | |
| Average Intel Iris Plus Graphics G7 (Ice Lake 64 EU) (2112 - 4630, n=28) | |
| Acer Swift 3 SF314-41-R8HZ | |
| Asus Zenbook 14 UX433FN-A6023T | |
| Lenovo Yoga S730-13IWL | |
| 1280x720 Performance Combined | |
| Asus ZenBook 15 UX534FT-DB77 | |
| MSI GL62M 7RD-077 | |
| Asus Zephyrus S GX531GM | |
| Huawei MateBook 14 KLV-W29 | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Asus VivoBook 15 X512FL-EJ205T | |
| Asus Zenbook 14 UX433FN-A6023T | |
| Dell Inspiron 15 5000 5585 | |
| Average Intel Iris Plus Graphics G7 (Ice Lake 64 EU) (1319 - 4163, n=28) | |
| Microsoft Surface Laptop 3 15 Ryzen 5 3580U | |
| Acer Swift 3 SF314-41-R8HZ | |
| Lenovo Yoga S730-13IWL | |
| 3DMark 11 Performance | 4950 puan | |
| 3DMark Ice Storm Standard Score | 58009 puan | |
| 3DMark Cloud Gate Standard Score | 12842 puan | |
| 3DMark Fire Strike Score | 2792 puan | |
| 3DMark Time Spy Score | 934 puan | |
Yardım | ||
| Rocket League | |
| 1280x720 Performance | |
| Acer Nitro 5 AN515-42-R6V0 | |
| Acer Aspire 5 A515-52G-723L | |
| Xiaomi Mi Notebook Air 13.3 2018 | |
| Huawei MateBook 13 i7 | |
| Dell Inspiron 15 5000 5585 | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Average Intel Iris Plus Graphics G7 (Ice Lake 64 EU) (22.1 - 123, n=16) | |
| Dell XPS 13 7390 Core i7-10710U | |
| HP ProBook 440 G6-5TK01EA | |
| 1920x1080 Quality AA:Medium FX | |
| Acer Nitro 5 AN515-42-R6V0 | |
| Acer Aspire 5 A515-52G-723L | |
| Huawei MateBook 13 i7 | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Dell Inspiron 15 5000 5585 | |
| Xiaomi Mi Notebook Air 13.3 2018 | |
| Average Intel Iris Plus Graphics G7 (Ice Lake 64 EU) (24.9 - 71.3, n=16) | |
| Dell XPS 13 7390 Core i7-10710U | |
| HP ProBook 440 G6-5TK01EA | |
| 1920x1080 High Quality AA:High FX | |
| Acer Nitro 5 AN515-42-R6V0 | |
| Acer Aspire 5 A515-52G-723L | |
| Huawei MateBook 13 i7 | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Xiaomi Mi Notebook Air 13.3 2018 | |
| Dell Inspiron 15 5000 5585 | |
| Average Intel Iris Plus Graphics G7 (Ice Lake 64 EU) (21.1 - 48.5, n=15) | |
| Dell XPS 13 7390 Core i7-10710U | |
| Shadow of the Tomb Raider - 1280x720 Lowest Preset | |
| Acer Nitro 5 AN515-42-R6V0 | |
| Acer Aspire 5 A515-52G-723L | |
| Dell Inspiron 15 5000 5585 | |
| Average Intel Iris Plus Graphics G7 (Ice Lake 64 EU) (15.6 - 33, n=13) | |
| Lenovo Yoga C940-14IIL 81Q9 | |
| Dell XPS 13 7390 Core i7-10710U | |
| düşük | orta | yüksek | ultra | |
|---|---|---|---|---|
| BioShock Infinite (2013) | 104.2 | 68.3 | 59.9 | 22.1 |
| The Witcher 3 (2015) | 52.7 | 36.3 | 19.6 | 9.9 |
| Rocket League (2017) | 119 | 68.5 | 44.3 | |
| Shadow of the Tomb Raider (2018) | 26 |
Emissions
System Noise
Fan noise is generally quiet at about 29 to 33 dB(A) when under most conditions. However, an annoying pulsing behavior occurs when under higher loads like gaming. For example, fan noise will steadily rise and fall between 31 dB(A) and 40.7 dB(A) when running Witcher 3. We would have preferred a fixed RPM to be more inconspicuous during gameplay.
Our unit exhibits slight electronic noise when placing an ear near the keyboard keys.
| Lenovo Yoga C940-14IIL 81Q9 Iris Plus Graphics G7 (Ice Lake 64 EU), i7-1065G7, Samsung PM981a MZVLB1T0HBLR | MSI Prestige 15 A10SC GeForce GTX 1650 Max-Q, i7-10710U, Samsung SSD PM981 MZVLB1T0HALR | Asus ZenBook S13 UX392FN GeForce MX150, i7-8565U, WDC PC SN520 SDAPNUW-512G | Lenovo Yoga C930-13IKB 81C4 UHD Graphics 620, i5-8550U, SK hynix PC401 HFS256GD9TNG | Razer Blade Stealth i7-1065G7 Iris Plus Iris Plus Graphics G7 (Ice Lake 64 EU), i7-1065G7, Samsung SSD PM981 MZVLB256HAHQ | Dell XPS 13 7390 2-in-1 Core i7 Iris Plus Graphics G7 (Ice Lake 64 EU), i7-1065G7, Toshiba BG4 KBG40ZPZ512G | |
|---|---|---|---|---|---|---|
| Noise | -3% | -4% | 2% | -1% | -1% | |
| off / environment * | 28.5 | 29.3 -3% | 28.1 1% | 27.9 2% | 28.3 1% | 28.1 1% |
| Idle Minimum * | 28.5 | 30.1 -6% | 28.1 1% | 27.9 2% | 28.3 1% | 28.1 1% |
| Idle Average * | 28.5 | 30.2 -6% | 28.1 1% | 27.9 2% | 28.3 1% | 28.1 1% |
| Idle Maximum * | 29 | 30.2 -4% | 29 -0% | 29.3 -1% | 28.3 2% | 28.1 3% |
| Load Average * | 33 | 31.5 5% | 41.1 -25% | 32 3% | 33.5 -2% | 31.7 4% |
| Witcher 3 ultra * | 40.7 | 37 9% | 41.1 -1% | 34.5 15% | 43.4 -7% | |
| Load Maximum * | 39.5 | 47 -19% | 41.1 -4% | 39.3 1% | 49.4 -25% | 43.4 -10% |
* ... smaller is better
Ses yüksekliği
| Boşta |
| 28.5 / 28.5 / 29 dB |
| Çalışırken |
| 33 / 39.5 dB |
 | ||
30 dB sessiz 40 dB(A) duyulabilirlik 50 dB(A) gürültülü |
||
min:  , med:  , max:  Audix TM1, Arta (15 cm uzaklık) environment noise: 28.5 dB(A) | ||
Temperature
(±) The maximum temperature on the upper side is 42.6 °C / 109 F, compared to the average of 35.4 °C / 96 F, ranging from 19.6 to 60 °C for the class Convertible.
(±) The bottom heats up to a maximum of 43.8 °C / 111 F, compared to the average of 36.8 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 23.7 °C / 75 F, compared to the device average of 30.3 °C / 87 F.
(±) Playing The Witcher 3, the average temperature for the upper side is 34.2 °C / 94 F, compared to the device average of 30.3 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 29.6 °C / 85.3 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 28 °C / 82.4 F (-1.6 °C / -2.9 F).
Stress Test
We stress the system to identify for any potential throttling or stability issues. When running Prime95, the CPU can be observed boosting up to 3.5 GHz for the first few seconds before eventually falling to 2.9 GHz for the next 30 seconds. CPU temperature would remain stable at about 96 C during this period. Thereafter, clock rates and temperature would drop and cycle indefinitely between 2.3 to 2.4 GHz and 77 C to 81 C, respectively. It's not surprising that the convertible is unable to maintain very high Turbo Boost clock rates for very long periods considering the form factor and what we observed during our CineBench R15 loop test above.
Running Witcher 3 results in a stable GPU clock rate of 1050 Hz and a core temperature of 77 C compared to 85 C on the XPS 13 7390 2-in-1 with the same CPU. Running on battery power will reduce performance just slightly; a 3DMark 11 run on batteries returns Physics and Graphics scores of 9687 and 4502 points, respectively, compared to 10494 and 4594 points when on mains.
| CPU Clock (GHz) | GPU Clock (MHz) | Average CPU Temperature (°C) | |
| System Idle | -- | -- | 38 |
| Prime95 Stress | 2.3 - 2.4 | -- | 77 - 81 |
| Prime95 + FurMark Stress | 1.2 - 1.3 | 850 | 70 - 72 |
| Witcher 3 Stress | 1.5 | 1050 | 77 |
Speakers
Lenovo Yoga C940-14IIL 81Q9 audio analysis
(+) | speakers can play relatively loud (90.3 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.2% lower than median
(±) | linearity of bass is average (10.9% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.2% away from median
(+) | mids are linear (3.2% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | reduced highs - on average 6% lower than median
(±) | linearity of highs is average (8.9% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (14.9% difference to median)
Compared to same class
» 21% of all tested devices in this class were better, 4% similar, 75% worse
» The best had a delta of 6%, average was 21%, worst was 57%
Compared to all devices tested
» 17% of all tested devices were better, 4% similar, 79% worse
» The best had a delta of 4%, average was 25%, worst was 134%
Apple MacBook 12 (Early 2016) 1.1 GHz audio analysis
(+) | speakers can play relatively loud (83.6 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.3% lower than median
(±) | linearity of bass is average (14.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.4% away from median
(+) | mids are linear (5.5% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2% away from median
(+) | highs are linear (4.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (10.2% difference to median)
Compared to same class
» 6% of all tested devices in this class were better, 2% similar, 92% worse
» The best had a delta of 5%, average was 19%, worst was 53%
Compared to all devices tested
» 4% of all tested devices were better, 1% similar, 95% worse
» The best had a delta of 4%, average was 25%, worst was 134%
Energy Management
Power Consumption
Idling on desktop will demand between 5 W and 12 W compared to just 3 W and 9 W on the FHD option likely due to both the brighter display and higher native resolution of our 4K unit. Consumption is consistently higher during higher processing loads as well which will impact battery life as shown in our next section.
It's worth noting that power consumption when gaming on the Lenovo is about 16 percent less than the Huawei MateBook 14 with GeForce MX250 graphics while GPU performance is roughly 20 to 27 percent behind according to 3DMark benchmarks. In other words, performance-per-Watt is not necessarily greater on Intel's integrated chipset when compared to the more common discrete Nvidia and Intel solution especially since gaming performance is generally more inconsistent on the Ice Lake Iris platform.
We're able to measure a maximum consumption of 64.6 W from the small (~10.8 x 4.7 x 3 cm) 65 W AC adapter immediately after initiating Prime95 for 100 percent CPU utilization. This high of a consumption is sustainable for just a few seconds before falling to just 35 W after 5 full minutes of stress as shown by our graphs below. We wouldn't be observing declining power consumption over time had the laptop been able to maintain maximum Turbo Boost indefinitely.
| Kapalı / Bekleme modu | 0.37 / 0.37 Watt |
| Boşta | 5.6 / 10.5 / 12 Watt |
| Çalışırken |
53.3 / 64.6 Watt |
   
| |
Key:
min: ,
med: ,
max: Metrahit Energy | |
| Lenovo Yoga C940-14IIL 81Q9 i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), Samsung PM981a MZVLB1T0HBLR, IPS, 3840x2160, 14" | Asus ZenBook S13 UX392FN i7-8565U, GeForce MX150, WDC PC SN520 SDAPNUW-512G, IPS, 1920x1080, 13.9" | Lenovo Yoga C930-13IKB 81C4 i5-8550U, UHD Graphics 620, SK hynix PC401 HFS256GD9TNG, IPS, 1920x1080, 13.9" | Lenovo Yoga C940-14IIL i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), Samsung SSD PM981 MZVLB512HAJQ, IPS LED, 1920x1080, 14" | Razer Blade Stealth 13, Core i7-1065G7 i7-1065G7, GeForce GTX 1650 Max-Q, Lite-On CA3-8D512, IPS LED, 3840x2160, 13.3" | Dell XPS 13 7390 2-in-1 Core i7 i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), Toshiba BG4 KBG40ZPZ512G, IPS, 1920x1200, 13.4" | Huawei MateBook 14 KLV-W29 i7-8565U, GeForce MX250, Samsung SSD PM981 MZVLB512HAJQ, IPS, 2160x1440, 14" | |
|---|---|---|---|---|---|---|---|
| Power Consumption | 19% | 17% | 23% | -35% | 33% | 1% | |
| Idle Minimum * | 5.6 | 3.4 39% | 3.4 39% | 3.2 43% | 10.7 -91% | 2.6 54% | 3.7 34% |
| Idle Average * | 10.5 | 6.3 40% | 7.5 29% | 7 33% | 13.6 -30% | 5.3 50% | 9.3 11% |
| Idle Maximum * | 12 | 10.4 13% | 11.8 2% | 8.9 26% | 15.7 -31% | 7 42% | 12.8 -7% |
| Load Average * | 53.3 | 51 4% | 47.7 11% | 47.6 11% | 60 -13% | 43.1 19% | 58.8 -10% |
| Witcher 3 ultra * | 46.9 | 39 17% | 64 -36% | 43.1 8% | 55.8 -19% | ||
| Load Maximum * | 64.6 | 62.7 3% | 63.2 2% | 63.1 2% | 71 -10% | 49 24% | 65 -1% |
* ... smaller is better
Battery Life
A battery deficit is expected when compared to the FHD SKU. Our 4K unit would shut down after approximately 7 hours of real-world WLAN use to be about 3 hours shorter than the FHD version. Both laptops were subjected to the same 150-nit brightness setting and Balanced power profile while looping various web pages at identical intervals.
Charging from empty to full capacity takes about 2.5 hours to be slower than most Ultrabooks where 1.5 hours is more common. The included USB Type-C charger can also be used to charge smartphones, Switch consoles, and other compatible laptops.
| Lenovo Yoga C940-14IIL 81Q9 i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), 60 Wh | Asus ZenBook S13 UX392FN i7-8565U, GeForce MX150, 50 Wh | Lenovo Yoga C930-13IKB 81C4 i5-8550U, UHD Graphics 620, 60 Wh | Lenovo Yoga C940-14IIL i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), 60 Wh | Razer Blade Stealth i7-1065G7 Iris Plus i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), 53.1 Wh | Dell XPS 13 7390 2-in-1 Core i7 i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), 51 Wh | |
|---|---|---|---|---|---|---|
| Battery Runtime | 16% | 52% | 46% | 34% | 23% | |
| WiFi v1.3 | 436 | 506 16% | 664 52% | 636 46% | 583 34% | 537 23% |
| Reader / Idle | 1710 | |||||
| Load | 99 | 64 |
Artılar
Eksiler
Verdict
Opting for the 4K UHD Yoga C940 instead of the less expensive FHD SKU will bring some advantages and disadvantages. The good news is that the higher native resolution allows for finer pen inputs, slightly deeper colors, and a measurably brighter backlight than the FHD SKU without impacting response times or contrast by very much. Colors and grayscale are curiously not as accurate out of the box, but an end-user calibration addresses this.
The main drawback of the 4K option is its shorter battery life by about 3 hours according to our measurements and slightly higher power consumption levels. Even so, 7 hours of real-world WLAN use should be more than enough for most users. All Yoga C940-14 SKUs share the same disadvantages when it comes to the difficult serviceability, pulsing fans when gaming, and highly variable gaming performance of Ice Lake.
The business-centric HP EliteBook x360 1040 series has more connectivity options, brighter displays, and slimmer designs for a higher starting price than the Lenovo Yoga C940-14. If you want a more balanced 14-inch consumer convertible without settling for the smaller 13.3-inch Spectre x360 or 13.4-inch Dell XPS 2-in-1, then the Yoga C940 should be on the top of your list.
Lenovo Yoga C940-14IIL 81Q9
- 12/19/2019 v7 (old)
Allen Ngo
Price comparison
