How far do your A64s undervolt at stock clocks?

[Vageetasjn]

I've been running my 3200+ winchester at 1.1V (down from 1.4V stock) at 2.0GHz. It booted at 1.05V, but not at 1.0V.

I'm curious to know if this is typical for the 90nm CPUs or if mine is a comparitively good chip.

So how low can you go?

 

[Brunnis]

I don't have one myself, but from what I've gathered from SilentPCReview, it's fairly standard. A few chips in the 1.8-2GHz range can operate at around 1V and most can probably do it on 1.1V. It is certainly worth lowering the voltage if one doesn't plan on overclocking, since power consumption should decrease substantially (down to ~20W for a 1.8GHz chip?).

 

[lopri]

With Opties you can undervolt and overclock at the same time.

 

[TheRyuu]

Originally posted by: lopri
With Opties you can undervolt and overclock at the same time.

QFT, Opty 175@2.6ghz (260x10) at 1.35 volts. (well its stock voltage, but it still a good OC, still pushing the Opty since I kind of want to game right now , so I picked a "probably" stable speed...well I ran prime for 5 minutes... )

 

[jazzboy]

A64 3000+ - S754, Newcastle, 2Ghz (stock)

Undervolted to 1.275 (1.32V cpu-z reading) at load. Default is 1.5V
Then for idle (800 Mhz) i have it set to 0.95 (0.99 cpu-z).

All done using RMclock

By default (as in with the standard A64 driver) it should idle at 1ghz/1.1v but for some reason my cpu is unstable using 5x multiplyer whatever voltage you throw at it.

Undervolting is great as it means your processor uses a hell of a lot less power (i.e. lowering the volts by 10% gives you more than 10% reduction in power). Therefore it creates less heat and you can constantly keep your fan on low speed. In fact I could probably now change my heatsink for a passive scythe ninja but I don't do changing CPUs and heatsinks as I find it all a bit scary still