Alright I want to underclock a pentium 4 processor drastically.

I want to go from 1500mhz to 400 mhz. is it possible?

a bit of backround infromation:

I work for a company that has a program that needs a processor at 400mhz or less. I know that you can underclock processors after your overclock them but how low can you bring it.

thanks ahead of time for your answers.

Don't do that!

I have three 400 MHz boxes here.

Want to trade?

its a work machine, or i would say yes... if i sent you a call tag you want to donate one?

Quote from: Nepix on January 16, 2008, 05:47:58 PM
its a work machine, or i would say yes... if i sent you a call tag you want to donate one?

No, I need a computer!

what type of program will only run on a super slow CPU?

Just infect it with spyware it'll bring it down to 400mhz or less 

JK ,yes?

what he said. ive brought a dc 1800 mhz cpu to 850 but my multiplier wouldnt klet me go lower,  might try jumpers, or can try a local freecycle outlet

Yea... Most multiplyers arent gonna let you get that low with that fast a CPU. If your clock speed is set in the BIOS you may be able to hack it and do something but... I would opt for getting a slow PC from the fleamarket or goodwill or something 

or find out what socket it is, and find one on ebay, which ould get you a bit closer, or with an underclocking , right on the money

Yea what sorta POS needs a 400 I strongly suggest you toss that out and while you are at it, get yourself a real Operating system ... somehting that ends in 'nix'
Cool.
Srinath.

Are you sure it's not the processor speed and the Windows version that the program needs?  XP has compatibility mode for Windows 98,95, etc.  Since you haven't listed what program you're trying to use, this is just a guess.  Hope it helps!

just emulate it.

Quote from: jdanna on January 21, 2008, 11:22:36 PM
just emulate it.

Yep, That's what I'm thinking too ... Might be worth taking a look at VirtualBOX or VirtualPC... Both are free and easy to use and will allow you to run windows95/98 at native speed; assuming you have a copy of windows98 kicking around.

VirtualBOX - http://www.virtualbox.org/
VirtualPC - http://www.microsoft.com/downloads/details.aspx?FamilyID=04d26402-3199-48a3-afa2-2dc0b40a73b6&DisplayLang=en

Also not sure if you can specify a certain processor speed to emulate - I don't remember being presented with those options in either application, but that doesn't mean it's not hidden somewhere.

Cheers,
J

its a dos based program used to calibrate pressure sensors in computers. it just gets a runtime error if you use it on any thing faster than 400mhz

Quote from: Nepix on January 22, 2008, 04:38:08 PM
its a dos based program used to calibrate pressure sensors in computers. it just gets a runtime error if you use it on any thing faster than 400mhz

dosbox is your friend.

http://www.dosbox.com/

it can be a bit tough to configure, but itll run just about anything you toss at it. including win 3.11

 

We actually use that to run some of the crappy old windows 9x stuff that is still around for students to learn from

i'm no computer geek but um...wouldn't it be easier/more profitable just to upgrade the system your using? 

Quote from: jserio on January 25, 2008, 08:47:45 AM
i'm no computer geek but um...wouldn't it be easier/more profitable just to upgrade the system your using? 

Sometimes, esp in the case of medical applications, upgrading the software is not possible.  In that case when the computer system that you are using dies and is replaced, it often times comes with an OS/hardware that is not compatible with the old software.  In this case you have two options find an old crusty computer somewhere that works or an emulator that will get the job done on a modern OS/hardware. 

Run everything on *nix.... Problem solved.

Wait, that might be flame bait.