SPCR

Hi, I'm just playing around with Crystal CPUID and thought I'd see what happens when I underclock my AM2 A64 3800+ single core down to 1.8Ghz from 2.4Ghz, and it seems not that much difference performance wise in the games I play - it's also a couple of degrees cooler (around 36-37C instead of 38-39C).

I'm mainly interested in what you guys think would be a safe undervolt I could do with zero testing while it's running at 1.8Ghz. I assume as my processor was intended for 2.4Ghz at 1.35v that it could do 1.8Ghz on a much lower voltage without much fuss. As I say, I don't want to have to mess about stress testing in Prime95 or anything, just something that's a little lower and I won't have to worry about crashing - would 1.25v be safe at that speed (and no testing)? Or would 1.3v be a safer bet. I don't want it to be near the limit! Also, is there any way to estimate roughly how many watts I'll be saving?

[EDIT] Also, are these settings saved by BIOS, or will it just revert to normal values on restart? (Crystal isn't enabled at startup).

Thanks for any info

i remember my venice core 3000+ ran at 1.8ghz @1.1v, i could've gone lower i think- but i was limited by the motherboard.. or maybe it was the cpu?

anyways- the voltages should reset every time you turn off your pc, unless you have cool and quiet activated.

Without changing the fsb, my dual core 4200 does any multiplier on 1.1V

My LE-1640 does 2.7GHz at 1.1V.

Suggesting something without zero testing is not that easy but I'd say give 1.1V a try.

Thanks for the input guys