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Does undervolting still kill these chips? - Page 2

post #11 of 27
Yea my mistake i forgot to mention that...its unlocked as a X3 @ stock speed at 1.15v (my 4th core turned out to be unstable...with gaming...dono why)
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post #12 of 27
Fair enough ok i got my CPU running at 3.2Ghz @ 4 Cores 1.17V
http://valid.canardpc.com/show_oc.php?id=1770452
post #13 of 27
Thread Starter 
http://forums.anandtech.com/showthread.php?t=1898265
http://www.xtremesystems.org/forums/...ad.php?t=79509

Both threads detail the issue.

Just worries me a bit since I know the memory controller's still on the CPU in K10.
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post #14 of 27
Quote:
Originally Posted by spleenharvester View Post
http://forums.anandtech.com/showthread.php?t=1898265
http://www.xtremesystems.org/forums/...ad.php?t=79509

Both threads detail the issue.

Just worries me a bit since I know the memory controller's still on the CPU in K10.
The people at Xtreme systems are using Ram voltages of like 3.2V. There talking about huge differences, there differences are 2 volts more on the ram then i use. So i think this is more for the older AMD CPUs. If it was really that bad they would put it on the warranty info not to under volt the CPU.
post #15 of 27
yeah, nowadays difference is between the CPU-NB at 1.1v (factory setting) and DDR3 memory at 1.5-1.7v, some as low as 1.35v. Also the memory controller's voltage is set by the CPU-NB voltage now, not the vcore/VTT/whatever it was before, so it should have less influence.

Only issue I've seen is intel's warning not to run RAM over 1.65v on 1366/1156/1155.
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post #16 of 27
Thread Starter 
Quote:
Originally Posted by Iroh View Post
yeah, nowadays difference is between the CPU-NB at 1.1v (factory setting) and DDR3 memory at 1.5-1.7v, some as low as 1.35v. Also the memory controller's voltage is set by the CPU-NB voltage now, not the vcore/VTT/whatever it was before, so it should have less influence.

Only issue I've seen is intel's warning not to run RAM over 1.65v on 1366/1156/1155.
'Tis the issue for me, I wanted to undervolt the CPU-NB since I can get it stable at 0.975v.

I remember that too, bit odd considering the memory controllers aren't housed on-chip to my knowledge.

Gonna contact AMD to make sure, they're usually pretty quick to reply.
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post #17 of 27
The thread at XS was with A64s you should be fine.
 
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post #18 of 27
Just gonna put my undervolt here.. 3.3ghz core/2.75ghz NB @ 1.175vcore. No problems at all, runs very cool, and under load drops into 1.122vcore because of Vdrop. My board has no LLC so I cant do anything about that..
Edited by Devilmaypoop - 4/15/11 at 11:28pm
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post #19 of 27
Thread Starter 
Lol unlucky, I had that board before, still got it waiting to be RMA'd. It was, quite frankly, atrocious.

Gonna undervolt in a bit when I can be arsed, cheers all
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post #20 of 27
Hmmm, Yes, probably undervolting to to such a low voltage would damage the chip. There is a thread somewhere about undervolting but I can't find it now....

If you think about it... the lower the voltage, the more the transistor's would be under strees.... I can't remember why but it's something to do with not enough power being supplied which leads to transistor's flickering on and off which is due to such low voltage.

Iv'e taken my 1055T to 0.9V and my computer woulden't post and kept switching on and off constantly really fast until I pumped the voltage to 0.92V which got it too boot with a BSOD.

Someone please correct me if I'm wrong of what I said above, But I can't find out my source on that information anymore.
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