Volt Modding a CPU

Question

I was just on a forum that shows volt modifications for intel Pentium D Cpu's. My quetion is this, by simply modding the voltage to my CPU will that overclock it on a Dell Dimension 9100. There's a guy on ebay saying he modded a Pentium 630 to 4.0ghz on a Dimension 9100. He said he only modified the CPU, nothing else. Now he's selling this PC. I was wondering if I could do that, knowing full and well it would kill my already dead warrenty. To me it seems that this mod would only up the voltage and tempature and not the clock speed, since it's already set by Dell Bios. However, if the Bios clocks the chip by voltage, we could be in luck huh? Anyone know, please respond. I'm not saying this is something I'm going to do, it's way to risky, but I would like to know if that is what he did to get that result.

Majestic · Answer

My best guess is that it could be done.  Back when I upgraded my XPS T model with a Pentium III 1 gig processor I noticed it would benchmark on some programs as being 99.7 MHz CPU.  Since the 1 gig processor upgrade had a slight higher voltage requirement than what my XPS T put out, I always attributed the benchmark difference on that.   Likewise, I would think if you could tweak up the voltage it would have an opposite effect on the processor's performance.     If you don't get any additional opinions here then I would suggest posting in the Dimension - General Hardware forum.  Since the BIOS forum has a rather limited audience you may get more opinions in the hardware venue.

Resibroc · Answer

Thank you much. I guess I will repost this there. I think it's something I might try when I'm ready to get rid of this computer. As my main PC right now, I think it's a little risky, yet 2 cores at 4.0ghz would be rather nice!

RoHe · Answer

There's an informative article on this subject in the Dec-06 PCWorld magazine. On some systems you can up the voltage in BIOS to increase speed (and heat). But major vendors like Dell & HP don't let you do that, for the obvious reason that they don't want to waste time/$ on people who fry their CPU by overclocking.

Ron

ManyDimensions · Answer

This is done with an after-market software application called cpufsb.exe provided by CPUCOOL. What this application can do is trick the BIOS into thinking the CPU supports a 1066Mhz system buss. The bottom line is, if your motherboard supports the Intel EE (Extreme Edition) CPU it 'should' support this mod. The real mod is done at the CPU clock device on the system motherboard and not the CPU itself. If you don't mind risk and associcated damages not covered under your Dell warranty, then give it a try.

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Volt Modding a CPU

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