What you need to undervolt
In order to achieve a good undervolting, we need some programs.
1. RM-Clock Utility – In this application we perform the undervolting. A must if we want to make it work.
2. Prime 95 – This application enables us to stress-test the CPU to see if it’s stable and what its max temperature is. Not a must. A similar application will do just as fine, or a demanding game. Using both of them is recommended.
3. Mobilemeter – An application that will measure the temperatures of the laptop. Of course you can use any type of application that works with your computer but I use this one.
4. 3DMark 03/05 – If you are unsure and really want to check that there are no performance losses, you can use this application.
Then we need a test-computer! In the following tests we will use this computer.
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Acer Aspire 5021WLMi
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| Weight | 3.1 Kg |
| System type | Notebook |
| Processor | AMD Turion 64 Mobile ML-28 2800+ 512 L2-cache (1600 Mhz) |
| Memory | 512 MB 333 Mhz 2×256 MB |
| Monitor | 15.4″ WXGA 1280×800 px Crystalbrite |
| Video card | Ati Radeon x700 128 MB |
| Modem, WLAN, LAN | Yes, 54BG, Gigabit LAN |
| Operating system | Microsoft Windows XP Home Edition |
Now, on to the undervolting.
I think it’s worth it. The stock voltage is generally overly cautious to ensure all CPU’s work reliably. However depending on the silicon lottery, lots of CPUs will run at a lower voltage, whilst still maintaining performance. Mine is a desktop, but I still shaved of 0.14v from the stock voltage (1.0v) of my Xeon and it dropped a few degrees when pushed hard. 0xc00000e9 So in a laptop it will definitely be worth it, with the caveat that it depends on the silicon, so some CPUs will accept lower voltage and some won’t, so make sure you thoroughly check… Läs hela »