'Safe' opteron voltage

[urzrkymn]

Cant find this info anywhere.
so what is a 'Safe' opteron voltage?
Also, what about temps?

Chip is a s939 146 CACJE 0604

[fhpchris]

AFI ran 2.05V

[urzrkymn]

on a good air cooler sry

[nn_step]

Completely safe is 1.6-1.65v..
but if you are willing to risk SDS up to 1.8v is allowable

[WeStSiDePLaYa]

Completely safe is 1.6-1.65v..
but if you are willing to risk SDS up to 1.8v is allowable


i dont think ive ever heard a single case of SDS on A64 chips, its always been degredation over time, or physical abuse. and degredation usually when people let the temps get too high or run periods of low vcore and high vdimm and burn the diodes.

[Repoman]

What is SDS? I've heard it a couple times and google has turned up nothing

[nn_step]

Sudden Death Syndrome.. it used to be more common with 130nm

[WeStSiDePLaYa]

Sudden Death Syndrome.. it used to be more common with 130nm


even my newcastle didnt die, and i ran that at 1.55x136% for a few nights of SNM loops.

[nn_step]

So what.. SDS by definition is any CPU that just dies unexpectedly and without any warning...

[003]

Whats the max safe voltage for a 165 on good air?

[nn_step]

Whats the max safe voltage for a 165 on good air?
about as high as you can get it without your CPU reaching 60C under full load

[Vapor]

Just use whatever volts provide the highest stable clocks. Simple as that.

[003]

about as high as you can get it without your CPU reaching 60C under full load But I thought that the DFI boards report totally wrong temps. Also, I don't want to risk SDS.

[nn_step]

1.6-1.7 should be fine with a good cooler

[fhpchris]

But I thought that the DFI boards report totally wrong temps. Also, I don't want to risk SDS.

SDS was only really a problem with the Northwoods above 1.7V.

AMD does not have that problem.

[Bob21]

AMD chips are beasts at handling voltage, just keep the temps below 60C for 24/7

[wizboy11]

I have an Opteron 175 and was wondering what the max volts would be for a good 24/7 OC. I figure I don't want to give it anything over 1.5v, would you agree?
BTW I have removed the IHS and am using Water Cooling.

(and how much life would I loose from using high voltages like 1.5+?)

[Vapor]

Look...use WHATEVER voltage you want. Chances are, at the higher volts you'll start losing an OC due to heat issues. Just use whatever is fastest--it doesn't make a difference. I've had my 4400+ between 1.64 and 1.72V for it's ENTIRE ~9 month life (got it the day it came out). It hasn't lost a SINGLE MHz in OCability or memcontroller strength or ANYTHING.

Simply: there isn't an SDS if you use it logically (why use a voltage if it makes the CPU too hot to clock as well as it could?). At above 1.85V there is some speculation, but if you have water and it scales to that level--WHOA.

[fareastgq]

1.75 on my 0530 175 (2.95 gigs) and 1.525 on my 0550 (3 gigs) (my board craps out after 333 htt or I would do more), and we are talking 24/7 use here, not piddly benching, so yeah, use whatever volts u want, it makes no diff, just keep your temps under 60c. Heat is not your friend. Never killed any chip with volts yet. that includes old xp's running at 2v.

[urzrkymn]

cool, cheers guys.

[Bob21]

As a side note the CACJE's memory controller seems to be different from many of the other's. So I would just play with the voltage and see what happens. What kind of 24/7 clocks are you hoping for?

[urzrkymn]

3.0 would be good, im there at 1.585V

[uOpt]

Be warned that on the DFI SLI-DR/Ultra-D boards (pre Expert), the situation is as follows:

The voltage that the monitoring in BIOS and OS/CPUz reports is not what you get, it is underrepresented
The voltage that you actually get is what you set in the BIOS - idle
Under CPU load these boards raise the voltage (usually by 0.025 V), without the monitoring displaying any change over idle


So if you set 1.60 Volts then you get 1.60 idle and 1.625 busy, and the display with be 1.56 idle and 1.56 busy.