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Athlon 640, low voltages?

post #1 of 5
Thread Starter 
Just got my AII 640 from the egg today, and i was messing around with overclocking and...

http://valid.canardpc.com/show_oc.php?id=1780904

Now, that is some really low voltage for an AII, considering the stock is 1.375...
so i tried prime...




any ideas? had voltage set to 1.2 in bios, but asrock IES drops is slightly.

I don't want you guys to think it's prime stable at that setting, worker 3 stoped a few minutes later. Still, i thought it wouldn't even boot at those volts, let alone go a bit of prime 100% stable.

Edit: will test 1.25 and 1.275 for actual stability tomorrow. too tired now.
Edited by qwertymac93 - 4/21/11 at 8:28pm
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post #2 of 5
If it is stable in stress tests then you have a good chip. If it runs less the spec volts then no worries if it is stable. Windows will run a bit lower under load then BIOS this is called Vdroop it is common on almost all boards. Sometimes you have to raise volts up a bit in BIOS to compensate, but as I said before if its stable then nothing to worry about. The lower the volts the lower the temps and potentially the better OC you can get. The voltage the chip is set by default is a voltage they know to be fully stable. If you can overclock and undervolt then you are on the right path. Be sure to run the test for at least 12 hours to ensure it is stable. Sometimes chips can run stress test for hours before failing or showing instability.
Edited by Rick Arter - 4/21/11 at 8:22pm
    
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by Rick Arter View Post
If it is stable in stress tests then you have a good chip. If it runs less the spec volts then no worries if it is stable. Windows will run a bit lower under load then BIOS this is called Vdroop it is common on almost all boards. Sometimes you have to raise volts up a bit in BIOS to compensate, but as I said before if its stable then nothing to worry about. The lower the volts the lower the temps and potentially the better OC you can get.
i know this, i ran my 250 @ 1.275 for well over a year, I'm just confused cause it seems too good to be true, any way to check volts definitively? I'm worried because if it is saying 1.18v and it is really pushing 1.25 or something, then at stock it must be pushing something obnoxiously high like 1.45 or something.

BTW the voltage is actually dead-on when i boot, it isn't until i activate IES(asrock's power saving feature) that the voltages all go slightly lower. Also, i thought Vdroop only happened at load.
Edited by qwertymac93 - 4/21/11 at 8:31pm
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post #4 of 5
Quote:
Originally Posted by qwertymac93 View Post
i know this, i ran my 250 @ 1.275 for well over a year, I'm just confused cause it seems too good to be true, any way to check volts definitively? I'm worried because if it is saying 1.18v and it is really pushing 1.25 or something, then at stock it must be pushing something obnoxiously high like 1.45 or something. not to mention this board SUCKS at overclocking, my old foxconn 780g board ran my 250@3.5ghz for months, this board cant even handle 3.3
The voltage that CPU-Z reads is about as accurate as software gets, if you had a volt meter and the read points of the board that would tell you 100%. Only way it would overvolt that much as if you ran it overclocked and on AUTO voltage for CPU. Some boards are just different same thing with my old P5K-E and my new board with a E8400. Once I got the BIOSTAR it overclocked better and with lower volts then the old one. Guess it was just wearing out after overclocking 3 CPUs on that board to high voltages and on air cooling.
Edited by Rick Arter - 4/21/11 at 8:42pm
    
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post #5 of 5
Thread Starter 
So apparently i got some kinda low-leakage cherry cpu that could probably clock pretty well, with a mobo that cant handle 220+ FSB...
Story of my life, i tell ya.

Oh well. maybe I'll get a nice 990fx board next year, then again maybe not.
Edited by qwertymac93 - 4/21/11 at 8:50pm
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