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日本Lenovo ThinkPad L14 Gen 4 (Intel) review – light device with quiet fan and long battery life
Temperatures and comfort, Battery Life
Max CPU load
In this test we use 100% on the CPU cores, monitoring their frequencies and chip temperature. The first column shows a computer’s reaction to a short load (2-10 seconds), the second column simulates a serious task (between 15 and 30 seconds), and the third column is a good indicator of how good the laptop is for long loads such as video rendering.
Average P-core frequency; Average E-core frequency; CPU temp.; Package Power
| Intel Core i7-1355U (15W TDP) | 0:02 – 0:10 sec | 0:15 – 0:30 sec | 10:00 – 15:00 min |
|---|---|---|---|
| Lenovo ThinkPad L14 Gen 4 (Intel) | 3.59 GHz @ 2.66 GHz @ 80°C @ 39W | 3.52 GHz @ 2.68 GHz @ 94°C @ 39W | 2.50 GHz @ 1.84 GHz @ 77°C @ 20W |
| HP Pavilion 15 (15-eg3000) | 3.67 GHz @ 2.80 GHz @ 76°C @ 45W | 2.67 GHz @ 2.06 GHz @ 73°C @ 25W | 2.22 GHz @ 1.73 GHz @ 69°C @ 18W |
| HP ZBook Firefly 14 G10 | 3.83 GHz @ 2.88 GHz @ 74°C @ 49W | 3.74 GHz @ 2.90 GHz @ 86°C @ 49W | 2.69 GHz @ 1.96 GHz @ 75°C @ 23W |
| HP ZBook Firefly 16 G10 | 3.85 GHz @ 2.89 GHz @ 67°C @ 50W | 3.32 GHz @ 2.48 GHz @ 75°C @ 37W | 2.14 GHz @ 1.44 GHz @ 66°C @ 17W |
| HP EliteBook 860 G10 | 3.90 GHz @ 2.95 GHz @ 77°C @ 50W | 3.35 GHz @ 2.12 GHz @ 86°C @ 36W | 2.48 GHz @ 1.77 GHz @ 65°C @ 20W |
| Acer TravelMate P2 (TMP216-51) | 3.90 GHz @ 2.93 GHz @ 89°C @ 55W | 2.73 GHz @ 2.49 GHz @ 86°C @ 37W | 2.93 GHz @ 2.08 GHz @ 77°C @ 28W |
| Acer TravelMate P6 (TMP614-53) | 3.52 GHz @ 2.59 GHz @ 67°C @ 45W | 3.22 GHz @ 2.40 GHz @ 73°C @ 40W | 2.63 GHz @ 1.90 GHz @ 72°C @ 28W |
| Lenovo ThinkPad X13 Gen 4 | 3.76 GHz @ 2.88 GHz @ 85°C @ 50W | 3.46 GHz @ 2.67 GHz @ 97°C @ 44W | 2.02 GHz @ 1.55 GHz @ 69°C @ 18W |
| Lenovo ThinkPad X1 Carbon Gen 11 | 3.66 GHz @ 2.80 GHz @ 94°C @ 49W | 3.23 GHz @ 2.50 GHz @ 97°C @ 38W | 2.00 GHz @ 1.55 GHz @ 72°C @ 19W |
| Lenovo ThinkPad X1 Yoga Gen 8 | 3.67 GHz @ 2.81 GHz @ 82°C @ 49W | 3.32 GHz @ 2.53 GHz @ 94°C @ 39W | 2.17 GHz @ 1.64 GHz @ 76°C @ 20W |
| Lenovo ThinkPad E14 Gen 5 | 3.49 GHz @ 2.65 GHz @ 69°C @ 42W | 3.28 GHz @ 2.46 GHz @ 82°C @ 38W | 2.20 GHz @ 1.62 GHz @ 77°C @ 23W |
| Lenovo ThinkPad L15 Gen 4 (Intel) | 3.34 GHz @ 2.54 GHz @ 86°C @ 39W | 3.16 GHz @ 2.45 GHz @ 93°C @ 35W | 2.38 GHz @ 1.77 GHz @ 77°C @ 20W |
| Lenovo ThinkPad T14s Gen 4 | 3.78 GHz @ 2.93 GHz @ 82°C @ 48W | 3.45 GHz @ 2.71 GHz @ 90°C @ 41W | 2.52 GHz @ 1.87 GHz @ 78°C @ 22W |
| Lenovo ThinkPad T14 Gen 4 | 3.83 GHz @ 2.89 GHz @ 78°C @ 51W | 3.7 GHz @ 2.82 GHz @ 93°C @ 49W | 2.38 GHz @ 1.75 GHz @ 64°C @ 21W |
| Acer Aspire 5 (A514-56M) | 3.82 GHz @ 2.82 GHz @ 64°C @ 55W | 2.18 GHz @ 2.26 GHz @ 65°C @ 37W | 1.43 GHz @ 1.98 GHz @ 60°C @ 28W |
| Dell Vostro 15 3530 | 2.06 GHz @ 2.70 GHz @ 94°C @ 40W | 1.56 GHz @ 2.22 GHz @ 96°C @ 26W | 2.06 GHz @ 2.25 GHz @ 95°C @ 26W |
| Lenovo Yoga Book 9 (13IRU8) | 2.23 GHz @ 2.58 GHz @ 76°C @ 40W | 2.13 GHz @ 2.42 GHz @ 85°C @ 35W | 1.64 GHz @ 2.03 GHz @ 77°C @ 24W |
| ASUS Zenbook S 13 OLED (UX5304) | 3.46 GHz @ 2.47 GHz @ 80°C @ 41W | 3.06 GHz @ 2.24 GHz @ 91°C @ 31W | 2.36 GHz @ 1.68 GHz @ 75°C @ 21W |
It’s great to see that the Core i7-1355U inside of our laptop can maintain high frequencies under any kind of load. However, the 94°C in the second column can raise a few eyebrows.
Comfort during full load
The fan is almost dead silent during light system usage and it’s quiet when the CPU is loaded at max. In this scenario, the keyboard deck and the left palm rest area feel a bit warm but not too hot. So you can use the device comfortably even when the processor is stressed for a long time. The three power presets are integrated into the Windows Power modes which is very convenient.
The fan doesn’t spin when the laptop is in an idle state and it reaches ~2700 RPM under heavy processor stress.
Idle
Max CPU loadBattery
Now, we conduct the battery tests with Windows Better performance setting turned on, screen brightness adjusted to 120 nits and all other programs turned off except for the one we are testing the notebook with. The 57Wh battery lasts for 20 hours of Web browsing or 10 hours of video playback. To achieve that, you have to apply the “Balanced” mode in the Windows “Power & Battery” menu and set the “Scheme for battery” to “Balanced” preset in the BIOS.
In order to simulate real-life conditions, we used our own script for automatic web browsing through over 70 websites.
For every test like this, we use the same video in HD.
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