Motherboard: Asus P5N-D Processor: Intel Core 2 Quad Q6600 2.40Ghz CPU Cooler: Arctic Cooling Freezer 7 Pro RAM: 4GB Samsung DDR2 PC2-6400 400mhz PSU: 800w Storm Super Silent Power Supply GPU: Palit 1024mb GDDR5 GTX460 OS: Windows 7 Professional x64
I overclocked my Q6600 from 2.40Ghz to 3.6 Ghz, the BIOS on startup see's the overclock but as soon as I'm on windows it only shows my CPU speed as 2.40Ghz. I've used CPU-Z and AIDA64 to check and they both only say 2.40Ghz per core.
These are the settings I used for overclocking, I looked around and found this to be the most reliable looking. I haven't had any glitches or anything obviously bad, just that it isn't being seen when on the OS so I'm not sure if my CPU is running at those actuall speeds I've OC'd it to.
Vcore = 1.55000V
DRAM = 1.850V
HT = 1.44V
NB = 1.48V
SB = 1.50V
This processor doesn't have Turbo Boost. Only things that are enabled on the BIOS are Virtulization Technology and Disable Bit. The Enhanced C1 (CIE) is Disabled along with Speed Step Technology and Limit CPUID Max Value
If your overclock was successful I would have expected to see a Core Speed of 3600.0 MHz, Bus Speed of 400.0 MHz and a Rated FSB of 1600.0 MHz.
It may be that the 3.6 GHz overclock is just too aggressive (i.e. unsuccessful) and the system has reverted back to stock default settings.
Start with a less aggressive overclock like 3.0 GHz and see if the settings stick. If the settings stick then increment the FSB and try again. Keep doing this until you reach a point where the settings don't stick which means you have found the maximum overclock that your system is able to handle and then choose an FSB that is just slightly lower than the maximum.
I managed to get the CPU at 3.60 GHZ after a BIOS Update once I restored the default settings. But after a few minutes the PC shut down, I got a look at the CPU Temp before it did and it was sitting at 65 C so I'm guessing it must've went a bit higher and then forced shutdown due to the heat.
I've tried OC'ing to 3.20GHZ but I'm back at square one with it not OC'ing at all. Gonna restore the default settings and flash the BIOS again, this time with a lower OC.
Overclocked again, back to 3.60 GHZ, everything so far is running fine, CPU Temp is staying between 43-50 C when I'm not running any intensive applications, and CPU-Z is recognizing all the settings. When I run a couple of more demanding app's CPU temp jumps from 50-59'ish. Suppose with such a large overclock on a Fan cooler that's ok, but so far so good and all is running fine.