AirFarceWon Posted March 6, 2005 Share Posted March 6, 2005 In this day and age, where the search for increasingly better performance prevails, I suppose my question must seem strange, but I have a HP Pavilion laptop with a Celeron 2.4 Ghz, and I'd like to know if it can be UNDERclocked, and if so, how? Quote Link to comment Share on other sites More sharing options...
epp_b Posted March 6, 2005 Share Posted March 6, 2005 Being a newer computer, the clock multiplier settings should be in the BIOS. Although, your options may be limited with a brand name such as HP.I'm not sure if newer computers still have jumpers, but it couldn't hurt to check. Quote Link to comment Share on other sites More sharing options...
FuzzButt Posted March 6, 2005 Share Posted March 6, 2005 (edited) I guess the question is why would you want to?If you had the Pentium M it would have settings to drop speed on battery. Here lies the problem with using desktop PC parts in laptops to make them cheaper. Edited March 6, 2005 by FuzzButt Quote Link to comment Share on other sites More sharing options...
Peachy Posted March 6, 2005 Share Posted March 6, 2005 The only way to overclock or underclock an Intel CPU is by changing the FSB frequency. All Intel CPUs are multiplier locked. Thus, if your Celeron is currently using a 100MHz FSB, you need to go down towards 66MHz or in between if your BIOS lets you. All FSB settings should be tweaked in your BIOS. There should be a manual or preset for different FSB frequencies. If the FSB is 133MHz then you could go to 100 or 66. Quote Link to comment Share on other sites More sharing options...
AirFarceWon Posted March 7, 2005 Author Share Posted March 7, 2005 Er, okaaaay...We-ell...I've looked into the BIOS, and I couldn't find anything related to my CPU that was subject to change...Now my question came from the fact that I wanted to lower my computer's "fuel" consumption, and heat production...There's no urgency here, and it was more of a rhetorical question than anything else...Thanks anyway...I think I'll leave it the way it is, since I'm no computer genius... Quote Link to comment Share on other sites More sharing options...
Peachy Posted March 7, 2005 Share Posted March 7, 2005 I just noticed you wrote that it was a HP laptop. If the CPU has SpeesStep it should dynamically underclock when there is very little CPU activity. It's called CPU throttling. Since this is name brand laptop, you may be correct that it won't allow you to modify the FSB. Quote Link to comment Share on other sites More sharing options...
genaldar Posted March 7, 2005 Share Posted March 7, 2005 If it's mostly the cooling effect that you want (and less noise since the fans are probably of the speed control variety) you could try something like CPUIdle. Quote Link to comment Share on other sites More sharing options...
genaldar Posted March 10, 2005 Share Posted March 10, 2005 genalder, cool program!---------airforcewon could need slowness due to old programs.me remembers going from 386 to 486 and it running too fast (!) for certain programs. i had to hit the turbo button to slow it down so they'd run! <{POST_SNAPBACK}> I've never actually used CPUidle, but I've heard good things for years so I figured I'd pass it on.Being too fast for old programs is why "emulators" like dosbox allow you to throttle down your processor speed. Heck I've got an apple II emulator that does the same thing.Now if you'll excuse me I just reminded myself I haven't played Oregon Trail in forever. Quote Link to comment Share on other sites More sharing options...
cyber1 Posted June 11, 2005 Share Posted June 11, 2005 you know you could always try MOSLOand also disabling the internal chache slowes it down like a bitch Quote Link to comment Share on other sites More sharing options...
epp_b Posted June 12, 2005 Share Posted June 12, 2005 I believe Celerons have very basic speedstepping features. Quote Link to comment Share on other sites More sharing options...
Peachy Posted June 12, 2005 Share Posted June 12, 2005 Speedstep is only available on mobile processors with the "M" designation. Pentium 4M don't count. Quote Link to comment Share on other sites More sharing options...
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