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Voltage limits?

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Name: jdiesel
Date: January 26, 2007 at 12:07:43 Pacific
OS: win xp pro
CPU/Ram: 3700+ Sandy
Product: Me
Comment:

I just got an Arctic Freezer 64 (dropped temps 10+ degrees) and now run stable at 250*11 for 8 hours plus running prime95. I had to up the vcore to 1.55 (1.35 stk. I may be able to get it stable at 1.53ish, but I haven't had a chance to try. (and I want to let the compound set in a bit)
Is this a safe voltage as long as my temps are good? When I run prime95 at level 8 priority, I max out at 55C core/ 46C CPU. The temps seem fine to me, but I have read many different things regarding voltages. So, not counting temps, whats the voltage limit for this chip?

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Response Number 1
Name: TMP-Man
Date: January 26, 2007 at 22:58:04 Pacific
Reply:

My suggestion is not to go over 10% from stock... I would watch out for idle and loading voltages. Some boards tend to over-volt/under-volt at idle/full load. My asus p5p800-se board is a one good example. Voltage = 1.3625v in BIOS idle = 1.38v load = 1.28v

TMP-Man

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P4 506 @ 4009Mhz 1.3625v
Thermaltake CLP0024 w/ 1700RPM 92MM + AS5
2GB OCZ 2-3-2-5 DDR400
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Leadtek 7600 AGP 590/1600 VF700 ALCU AS5


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Response Number 2
Name: Sabertooth
Date: January 27, 2007 at 09:41:29 Pacific

Response Number 3
Name: jam
Date: January 27, 2007 at 10:18:44 Pacific
Reply:

Overheating & overvolting are related, but overvolting should be treated separately. Overheating can *usually* be controlled thru various cooling techniques, but overvolting can cause "electromigration". Electromigration is thought to be the main reason for the sudden failure of overclocked P4 Northwood CPUs (nicknamed "Sudden Northwood Death Syndrome" aka SNDS). Here's an article about it:

http://www.xbitlabs.com/news/cpu/di...

http://en.wikipedia.org/wiki/Electr...

You should always strive for the lowest possible voltage that will allow your system to run stable. And the ability to run prime95 for 8 hrs doesn't guarantee overall stability, all it really means is that it's "prime95 stable". You may find otherwise once you multitask or do any hard gaming.


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Response Number 4
Name: jdiesel
Date: January 27, 2007 at 17:29:55 Pacific
Reply:

I haven't noticed any issues when gaming or multitasking. I am going to slowly lower the vcore until I become unstable. I am pulling 33s superpi times and am very happy with the performance.
I am shooting for 1.48-9. That would put it lower than the max listed by AMD and also keep in within tmpman's suggestion od 10%. Thanks for the replies.

"So I have that going for me....Which is nice"


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