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q6700 issues, not how to OC

Last response: in Overclocking
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January 21, 2008 2:08:44 PM

hi guys, i recently purchased a q6700 and have noticed some strange things about it.

first whenever i do any overclocking (2.66 stock to 3.2)cores 0 and 1 seem to be rock solid stable at stock vcore, but cores 2 and 3 produce errors in prime95 within 1 minute. i can manually increase the vcore and cores 2 and 3 will run just fine and error free.

second i have noticed that cores 2 and 3 run about 3 to 6 degrees C COLDER than cores 0 and 1. i have an aftermarket heatsink with AS 5 and i know how to secure a LGA 775 heatsink.

i dont know much about how these processors work but looking at the temps and the additional vcore that cores 2 and 3 require. that makes me think maybe those cores for some reason are not receiving the same voltage as cores 0 and 1. less voltage means lower temps and instability when overclocked.

idle temps are
c0: 36
c1: 34
c2: 28
c3: 31

the temp difference between the cores stays the same even at 100% load(quad prime) and the hottest core does not break 55C at stock clock and 59C at 3.0 ghz


not asking for help on overclocking here im just asking your oppinion about what could be going on with my core 2 and 3.

thanks

brian

More about : q6700 issues

January 21, 2008 2:10:32 PM

I would say that it just has to do with minor manufacturing differences in the dies. It is 2 seperate dies after all glued together.

That said... 2 of mine run cooler than the other, but I've never payed attention to which ones fail first.
January 21, 2008 2:20:55 PM

yea i am just wondering if the difference is enough for me to send it back for a new one, i have really grown quite attached to it. lol.

i have had cores 0 and 1 prime95 stable up to 3.33 at stock volts and cores 2 and 3 can't even do 3ghz
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January 21, 2008 2:22:09 PM

briandr said:
yea i am just wondering if the difference is enough for me to send it back for a new one, i have really grown quite attached to it. lol.

i have had cores 0 and 1 prime95 stable up to 3.33 at stock volts and cores 2 and 3 can't even do 3ghz



What's the VID? If it's 1.2875 over lower I wouldn't bother.. I'd be worried about getting a 1.325 VID processor.
January 21, 2008 2:25:32 PM

i don't know what the VID is but right now im running 1.152 vcore at stock clocks.
January 21, 2008 2:26:14 PM

briandr said:
i don't know what the VID is but right now im running 1.152 vcore at stock clocks.


I'd keep it then. It is still going to be a great OCer.
January 21, 2008 2:30:04 PM

ok just looked at core temp and its showing a VID of 1.2625v, cpu-z is showing a vcore of about 1.15. what is VID?
January 21, 2008 2:32:04 PM

briandr said:
ok just looked at core temp and its showing a VID of 1.2625v, cpu-z is showing a vcore of about 1.15. what is VID?


VID is voltage identification. It's the max spec the processor needs to run stable at stock frequencies... It's also what you are setting in the BIOS when you change vCore. The vOffset is there to prevent the voltage from going over the VID.

VID - vOffset (vDrop) = Windows Idle Voltage (CPU-Z)
January 21, 2008 7:24:46 PM

Anything going above the VID causes instabilities.
January 22, 2008 12:09:47 PM

"Anything going above the VID causes instabilities"

can you explain your statement? thank you!
!