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Guide to Overclocking the Core I7 920 or 930 to 4.0ghz - Page 118

post #1171 of 1477
Just about 2 hours into Prime95 and still running stable with QPI at 1.25 and 77C.

I loaded up my default profile (no overclock) and my NB temp dropped 10 degrees. So it looks like my OC is causing the NB temp issues.
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post #1172 of 1477
yeah they really do depend on the CPU fan and/or Case airflow. your H60 isn't going to be blowing any air over the NB HS, so thats why
post #1173 of 1477
Quote:
Originally Posted by andy4theherd View Post
Just about 2 hours into Prime95 and still running stable with QPI at 1.25 and 77C.

I loaded up my default profile (no overclock) and my NB temp dropped 10 degrees. So it looks like my OC is causing the NB temp issues.
You may want to try Enabling EIST and Halt state. i beleive having those enabled will keep your idle temps (and power draw) much lower
post #1174 of 1477
Quote:
Originally Posted by andy4theherd View Post
I never paid much attention to the NB temps until now, but I'm sure they were in the 50's before today.

I lowered QPI to 1.25. 40 minutes into Prime95 and I'm stable at 78C. The NB temps haven't changed. It was 73 at idle and is 73 40 minutes later at 100% load. I wonder if a sensor is the problem?

From reading about the net it appears the NB on x58 boards tend to rely a lot on the CPU fan. I found several other conversations with H60 owners getting really high NB temps.

I folded for 2 weeks not stop bigadv units with my sig rig at 3.8 GHz and I can tell you that my NB temps were nowhere near as high. I was between 45-55 and this was because there was nobody home to open some windows so the Antec case push some fresh air.


I advise you compare with other people to see why you have such high temps. If memory serves, you can replace the TIM on these, give it ago
 
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post #1175 of 1477
I installed a 92mm fan directly on top of the Northbridge heat sink. The NB is now 52c at idle. It was 67c before. Lesson learned, a CPU fan/cooler keeps other things on the board cool too ;-)

As for my OC, I'm down to 1.29 vcore. I've only been running Prime95 tests in 1 to 2 hour sessions before lowering vcore. So far, still stable at 4.01ghz. Last night I went in and changed IOH from 1.2 back to Auto thinking this may help with the NB temps. I am going to plug 1.2 back in now that I have the NB fan.
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post #1176 of 1477
I'm fooling around with my i7 920 D0, it's currently at 4.2 Ghz with 1.376 volts.
I'm sure I can lower the voltage to get it stable, but I was wondering what is the on going average for a 4.2ghz i7 920 D0?
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post #1177 of 1477
Quote:
Originally Posted by qazzaq2004 View Post
I'm fooling around with my i7 920 D0, it's currently at 4.2 Ghz with 1.376 volts.
I'm sure I can lower the voltage to get it stable, but I was wondering what is the on going average for a 4.2ghz i7 920 D0?
My 930 gets 4.2 at around 1.32v or so
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post #1178 of 1477
Quote:
Originally Posted by qazzaq2004 View Post
I'm fooling around with my i7 920 D0, it's currently at 4.2 Ghz with 1.376 volts.
I'm sure I can lower the voltage to get it stable, but I was wondering what is the on going average for a 4.2ghz i7 920 D0?
You cannot make an educated guess because not all chips are equal. My other rig with a 920 D0 needs 1.32 for 4.2 GHz. I've seen other D0 chips with lower voltage or higher.
 
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post #1179 of 1477
It is okay to push CPU to 4 GHz w/ Voltage set to Auto and undervolt afterwards ?
I was wondering if the voltage would set itself out of CPU safe range when being @4 GHz...
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post #1180 of 1477
any reason why my 1600Mhz ram is only running 1066 according to the BIOS?
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