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How Do I Underclock My Laptop?

post #1 of 6
Thread Starter 
i got xp pro sp3 on a gateway laptop. i'd like to underclock my laptop to increase battery life. what programs can i download to do this?
post #2 of 6
If you can get into the BIOS, if not locked, then reduce the multiplier and or the BLCK. It's the multiplier x the BLCK (most likely for that time period; ie processors/mobo at Win XP era).
 
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post #3 of 6
You can try setfsb. There's no guarantee it will have the correct PLL for your laptop, and you may have to use trial and error to find the right one. However, if you can get it to work, you just reduce the fsb and test for long term stability with a program like Prime 95. However, if you're looking to save battery life, another program you can try is throttlestop. It can limit your chip to whatever its idle clock is all the time, instead of going up into other C states. Another option would be RMclock, which you can use to undervolt your laptop. That would have the most impact on battery life. Another way to increase battery life is to optimize Windows by getting rid of any startup programs you don't need and services you don't use. Disabling your DVD drive when you don't need it is another way. I know this may be a bit long-winded, but I hope you find at least something useful out of it.
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post #4 of 6
Control panel, power options, advanced settings, processor power management, maximum processor state. thumb.gif
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post #5 of 6
Thread Starter 
Quote:
Originally Posted by Gunderman456 View Post

If you can get into the BIOS, if not locked, then reduce the multiplier and or the BLCK. It's the multiplier x the BLCK (most likely for that time period; ie processors/mobo at Win XP era).

hi gunderman.. when i go into the bios, i dont see any features that you mention... how do i unlock the bios on my laptop?
Quote:
Originally Posted by rockgod213 View Post

You can try setfsb. There's no guarantee it will have the correct PLL for your laptop, and you may have to use trial and error to find the right one. However, if you can get it to work, you just reduce the fsb and test for long term stability with a program like Prime 95. However, if you're looking to save battery life, another program you can try is throttlestop. It can limit your chip to whatever its idle clock is all the time, instead of going up into other C states. Another option would be RMclock, which you can use to undervolt your laptop. That would have the most impact on battery life. Another way to increase battery life is to optimize Windows by getting rid of any startup programs you don't need and services you don't use. Disabling your DVD drive when you don't need it is another way. I know this may be a bit long-winded, but I hope you find at least something useful out of it.

hi rockgod... well i'm tried using killswitchxp but it didnt interact with my computer for some unknown reason. and i already got all but 2 startup programs and only 13 services that statup at boot. but i just wish that my hard discs can spin down when my laptoip is inactive for certain periods of time. can you recommend a program that can spin down my hard discs? i'd apprecite it.. please let me know.
post #6 of 6
Unfortunately,. I'm not aware of any programs to spin down a hard drive. Now, you can go into power management settings and probably get a secondary drive to power down. However, you can't get a primary drive to power down, as it is always being used to cache more data into your ram. Also, to answer your other question. If your laptop doesn't have an unlocked bios, you'd have to either find, or make your own unlocked bios. Extremely tricky stuff, and probably not worth it for the end result. Laptops are pretty much resigned to using software to tweak things. This is one of the reasons you tend to not get answers to laptop questions here as easily as for desktop questions. You go at it a completely different way.
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Asus G750jw
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CPUMotherboardGraphicsGraphics
Core i7 3770k  ASrock Extreme4 P67 Sapphire Dual X OC 7950 Sapphire Dual X OC 7950 
RAMHard DriveHard DriveCooling
8GB Corsair Vengeance 1866 Kingston V300 240gb (OS) Seagate 1tb (data) Corsair H60  
OSMonitorMonitorPower
Windows 7 Ultimate Samsung S27C750P 75Hz A-MVA Dell S2340m (x3) Corsair TX850 
CaseAudioAudioAudio
Azza Hurrican 2k ODAC Hifiman HE-500 O2 amp 
CPUGraphicsRAMHard Drive
Core i7 4700HQ GTX 765m 8GB DDR3L 1600 Corsair Force 3 120gb SSD 
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