Lenovo ThinkBook 14 Gen 4 review – business in style
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 i5-1235U (15W TDP) | 0:02 – 0:10 sec | 0:15 – 0:30 sec | 10:00 – 15:00 min |
|---|---|---|---|
| Lenovo ThinkBook 14 Gen 4 | 2.55 GHz @ 2.33 GHz @ 64°C @ 33W | 2.45 GHz @ 2.31 GHz @ 71°C @ 32W | 2.32 GHz @ 2.19 GHz @ 67°C @ 28W |
| Acer Aspire 3 (A315-59) | 3.07 GHz @ 2.76 GHz @ 64°C @ 45W | 2.84 GHz @ 2.61 GHz @ 73°C @ 40W | 2.37 GHz @ 2.29 GHz @ 70°C @ 28W |
| ASUS Vivobook 17 (X1702) | 3.21 GHz @ 2.68 GHz @ 68°C @ 39W | 2.86 GHz @ 2.53 GHz @ 72°C @ 33W | 2.15 GHz @ 2.22 GHz @ 61°C @ 24W |
| Lenovo ThinkPad L15 Gen 3 | 3.25 GHz @ 2.69 GHz @ 88°C @ 44W | 3.05 GHz @ 2.64 GHz @ 95°C @ 41W | 1.98 GHz @ 1.92 GHz @ 70°C @ 20W |
| Fujitsu LifeBook U7512 | 3.00 GHz @ 2.54 GHz @ 88°C @ 40W | 2.40 GHz @ 2.14 GHz @ 85°C @ 28W | 2.31 GHz @ 2.07 GHz @ 83°C @ 26W |
| HP ProBook 450 G9 | 3.44 GHz @ 2.82 GHz @ 80°C @ 47W | 2.45 GHz @ 2.14 GHz @ 74°C @ 26W | 2.33 GHz @ 2.09 GHz @ 73°C @ 24W |
| HP ProBook 440 G9 | 3.25 GHz @ 2.74 GHz @ 79°C @ 46W | 2.49 GHz @ 2.23 GHz @ 87°C @ 30W | 2.20 GHz @ 2.08 GHz @ 73°C @ 24W |
| Lenovo ThinkBook 14s Yoga Gen 2 | 2.55 GHz @ 2.39 GHz @ 70°C @ 32W | 2.49 GHz @ 2.38 GHz @ 75°C @ 32W | 2.20 GHz @ 2.10 GHz @ 71°C @ 24W |
| Microsoft Surface Pro 9 | 3.32 GHz @ 2.78 GHz @ 75°C @ 46W | 3.06 GHz @ 2.54 GHz @ 82°C @ 42W | 1.91 GHz @ 1.79 GHz @ 64°C @ 19W |
| Microsoft Surface Laptop 5 (13.5″) | 3.35 GHz @ 2.84 GHz @ 69°C @ 44W | 3.27 GHz @ 2.78 GHz @ 80°C @ 42W | 2.24 GHz @ 2.17 GHz @ 71°C @ 22W |
| ASUS Vivobook 15 (X1502) | 2.91 GHz @ 2.49 GHz @ 78°C @ 39W | 2.62 GHz @ 2.37 GHz @ 81°C @ 33W | 2.30 GHz @ 2.19 GHz @ 68°C @ 27W |
| Acer TravelMate P2 (TMP215-54) | 3.67 GHz @ 3.09 GHz @ 90°C @ 55W | 2.83 GHz @ 2.55 GHz @ 85°C @ 33W | 2.59 GHz @ 2.44 GHz @ 84°C @ 28W |
| HP EliteBook 650 G9 | 3.26 GHz @ 2.80 GHz @ 89°C @ 45W | 2.63 GHz @ 2.39 GHz @ 91°C @ 32W | 2.25 GHz @ 2.15 GHz @ 79°C @ 24W |
| HP EliteBook 640 G9 | 3.27 GHz @ 2.77 GHz @ 90°C @ 45W | 2.53 GHz @ 2.32 GHz @ 90°C @ 30W | 2.32 GHz @ 2.17 GHz @ 74°C @ 24W |
| HP EliteBook 840 G9 | 3.09 GHz @ 2.75 GHz @ 83°C @ 46W | 2.73 GHz @ 2.46 GHz @ 89°C @ 37W | 1.58 GHz @ 1.67 GHz @ 61°C @ 17W |
| Lenovo ThinkPad E14 Gen 4 | 3.28 GHz @ 2.77 GHz @ 84°C @ 44W | 3.18 GHz @ 2.77 GHz @ 90°C @ 44W | 2.49 GHz @ 2.28 GHz @ 77°C @ 28W |
| HP Pavilion Plus 14 (14-eh0000) | 2.85 GHz @ 2.43 GHz @ 77°C @ 39W | 2.34 GHz @ 2.10 GHz @ 75°C @ 29W | 1.84 GHz @ 1.79 GHz @ 65°C @ 20W |
| Lenovo IdeaPad 5 (15″, 2022) | 3.60 GHz @ 3.08 GHz @ 73°C @ 55W | 3.44 GHz @ 2.95 GHz @ 88°C @ 51W | 2.80 GHz @ 2.49 GHz @ 69°C @ 35W |
| Lenovo ThinkPad L14 Gen 3 | 3.20 GHz @ 2.77 GHz @ 83°C @ 44W | 3.10 GHz @ 2.71 GHz @ 94°C @ 43W | 1.89 GHz @ 1.95 GHz @ 72°C @ 20W |
| Acer Aspire Vero (AV14-51) | 3.63 GHz @ 2.87 GHz @ 84°C @ 55W | 2.73 GHz @ 2.36 GHz @ 81°C @ 33W | 2.49 GHz @ 2.23 GHz @ 79°C @ 28W |
| MSI Modern 14 (C12M) | 3.17 GHz @ 2.69 GHz @ 77°C @ 45W | 3.10 GHz @ 2.61 GHz @ 81°C @ 45W | 2.69 GHz @ 2.45 GHz @ 78°C @ 35W |
| Dell Latitude 15 5530 | 3.57 GHz @ 3.02 GHz @ 94°C @ 52W | 2.03 GHz @ 2.09 GHz @ 76°C @ 21W | 2.24 GHz @ 2.19 GHz @ 64°C @ 23W |
For some reason, despite the two heat pipes, Lenovo keeps this notebook’s performance in short loads limited. Its 2.55 GHz on the P-cores is quite contrasty to the 3.28 GHz on the Lenovo ThinkPad E14 Gen 4. Indeed, the picture mellows down towards the end of the test, and the ThinkBook 14 Gen 4 actually posts lower temperatures.
Comfort during full load
Thanks to this, the keyboard of the device doesn’t get too hot. We have to give it to Lenovo for insulating the internals from the keyboard good enough because we’ve seen hot surfaces even at lower internal temperatures. As far as fan noise goes, the device doesn’t get too loud either, perhaps explaining the low clocks in short loads.
Battery
Now, we conduct the battery tests with the 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. Our configuration is equipped with a 45Wh battery pack. It got us through 5 hours and 33 minutes of Web browsing, or 5 hours and 38 minutes of video playback.
Brightness: 180 nits; Display Mode: SDR
Time to Full Discharge: Higher is Better
In order to simulate real-life conditions, we used our own script for automatic web browsing through over 70 websites.
Author: Alex Iliev
Author: eng. Kroum NikolovHead of Engineering at LaptopMedia.com, inventor and innovator with 40+ years of experience in electronics and high technology.
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