Is there a chart for Voltage increases, @ certain speeds?

[Michael_Myers]

Hello again.......I have a Duron 800 @1000mhz right now. (7.5x133) and I am running just fine at 1.8v....However @ 1.75v I get the windows registry error on startup. :(

So that made me wonder......is there a chart somewhere that says (and I KNOW it would be in general) Ok for a duron 800 to hit 1000mhz.....you need to set your voltage to xyz......and your I/O to xyz and then it should work.

Or.......is that just where your own trial and error comes into play?

Also.....you guys know you can get to 1000mhz in different ways. IE....7.5x133 or 10X100 etc..etc....so does it work the same way for power? Say at 1.75v I bumped my I/O to 3.5 or 3.6......COULD that make a difference and let me go ahead and post correctly into windows? And if so, would a higher I/O and lower voltage reduce CPU temps? I am just thinking out loud here. Comments welcome

[Paul -The Mad Hatter]

there's not any chart, and if their was one, i wouldn't trust it. All chips are diff. so their's no telling what it can do.

[Hoot]

As Mad Hatter said, it is pretty much a "Cut and Try" process. What I do, when I get a new CPU or motherboard, is characterize the behavior for that particular setup. That is the art of Overclocking. My exact process is to start at the rated speed for the CPU and see what is the minimum voltage I can get it to run stable at. By stable, I do not mean it passes POST, or gets into the Windows Desktop. I mean it successfully runs a CPU stressing program like Prime95 Torture. I bump the speed and see what voltage that runs at and what the resulting temperature is. I bump the frequency and repeat this up until I can no longer get it to run stable. I then plug it into MS Excel, chart it and save it in my experiments notebook for future referrence. You will see a "Sweet Zone" for your setup and an extreme wall. Here is a plot of my Duron 600, from back when I first got it, as it performed in my Abit KT7 motherboard with PC133 CAS3 Ram. This was an enjoyable proect that took up an evening.

Hoot

[Hoot]

I forgot to mention that same Duron 600, with a better motherboard (KT133A based), better memory (PC150 CL2) and better cooling (MC-462A) now runs 1120 Mhz. That is as good as it will ever go for me.

Hoot