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Overclocking i7 860 on p7p55-M
Hey guys,
Just looking for some advice regarding overclocking.
So, heres my rig:
Antec P183 Case
Intel Core i7 860 2.8GHz Socket LGA 1156 8MB L3 Cache
Crucial 4GB (2x2GB) DDR3 1333MHz/PC3-10600 Memory Kit CL9 1.5V
Antec TruePower New 650W Modular PSU
Arctic Cooling Freezer 7 Pro rev 2 Heatpipe CPU Cooler
Asus P7P55-M P55 Socket
Currently I have a stable overclock at 3.6Ghz (3600MHz x 20), but there seems to be some sort of power saving going on, the vCore keeps dropping from 1.216 to 1.080 and the freq down to 1620MHz x 9.
Ive been searching around for power saving options such as EIST but cant find anything. Does anyone have any ideas?
Thanks,
Max
EDIT-Update:
Okay so the searching I did around the internet turned up several power saving options in the BIOS. I have these all disabled (including intel speedstep). A few of the options people say to turn off just vanish when I switch to manual overclocking, so I am assuming that these are automatically disabled. The other reason I feel safe assuming this is because it has only started doing this on newer bios updates, in the older versions the options were still there.
In this motherboard you cant specify your VCore voltage, you can only set the VCore over voltage. Now I read that this was the extra voltage over 1.0v. Its currently set at 0.2v. However I've noticed that when I open up CPU-Z, whether under stress testing or not the voltage seems to fluctuate. I have tried enabling and disabling certain voltages but just cant seem to get it to stop this drop. Max temps on Coretemp and Real Temp are ~72 Celcius.
When the voltage drops, the bus speed stays the same, but the multiple drops to 9, making the speed 1620.0MHz..... It seems to spend more time at the 9 multiplier than at 20...
If anyone has any ideas please enlighten me!
Update 2
I thought about playing with prime95 when not over clocked and a strange thing happened. The processor runs at 133.8 x 22 = 2.943GHz @ 1.128v, but when you activate the torture test the voltage drops to 1.072v...now i really have no idea whats going on. I activated intel turbo boost and another feature for allowing the OS to control the freq. of the CPU, but why would the voltage drop? Also why is nothing else changing?
Last edited by darksupernova; 09 Sep 2011 at 12:02. Reason: Update