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Overclock Q6600 / ASUS P5K-PRO

post #1 of 14
Thread Starter 
Hi all,

I've had an o/c E8400 in my system running @ 4ghz from 3ghz. Upgraded to a Core2Quad 2.4ghz - I'd like to be able to overclock this, read it can go to around 3.6? I have a decent cooling fan on top (not stock -- heavy duty was coping excellently with a 4ghz overclock).

Could anyone give me an idea of what I need to set within the BIOS?

Thanks!

Jason
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post #2 of 14
Same way you did the E8400, except this chip can take more voltage being that it is 65nm, up to 1.55v is safe I believe.thumb.gif
post #3 of 14
Thread Starter 
Thanks - as a test I thought I'd use the same profile as I had for the E8400, it worked but I had to lower the FSB down to 400 from 444 -- it came up as running @ 4ghz!! Is it safe at that speed?? Running at 3.6ghz now will do some stress testing.

Cheers

Jason
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post #4 of 14
Wait, the Q6600 is at 4ghz? At what voltage? That would mean you have a multiplier of 10x?!
post #5 of 14
Thread Starter 
When I rebooted it showed @ 4ghz! I immediately went into the bios & changed the fsb - the multiplier is set to auto I'm sure. I think the voltage is set to 1.25 as that's what the E8400 was on. Tried a quick prime95 test & #4 fails after a few seconds, maybe up the voltage?

Thanks,

Jason
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post #6 of 14
Thread Starter 
Here are my settings (think some may have changed but are close enough)

Ai Overclock Tuner : Manual
CPU Ratio Setting : Auto
FSB Strap to North Bridge : Auto
FSB Frequence : 400
PCIE Frequency : Auto
DRAM Frequency : Auto (Shows on Startup as 841)
DRAM Command Rate : Auto
DRAM Timing Control : Manual
- CAS# Latency : 5 DRAM Clocks
- RAS# to CAS# Delay : 5 DRAM Clocks
- RAS# PRE Time : 5 DRAM Clocks
- RAS# ACT Time : 18 DRAM Clocks
- RAS# to RAS# Delay : Auto
- REF Cycle Time : 60 DRAM Clocks
- WRITE Recovery Time : Auto
- WRITE to READ Delay : Auto
- READ to PRE Time : Auto
DRAM Static Control : Auto
Transaction Booster : Auto

CPU Voltage : 1.33750
CPU PLL Voltage : Auto
FSB Termination Voltage : Auto
DRAM Voltage : 2.2
NB Voltage : 1.33
SB Voltage : Auto
Clock Over-Charging Voltage : Auto

Load-Line Calibration : Enabled
CPU GTL Voltage Reference : Auto
NB GTL Voltage Reference : Auto
CPU Spread Spectrum : Disabled
PCIE Spread Spectrum : Disabled

I'm finding with Prime95 the fourth worker crashes pretty quickly. What settings do I need to look at changing? I'm pretty sure the CPU Voltage is higher than listed - in CPUz it shows as 1.416.

Thanks!

Jason
Edited by hyperjase - 1/28/12 at 7:50am
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post #7 of 14
Set the CPU ratio setting to manual, then set it to 9, which should be max for your procesor. With an FSB of 400 times 9 multiplier you'll be at 3.6ghz. Start testing from there. If auto set you at 9 already and the 4th core is failing, raise cpu voltage with a max, in CPU-Z, of 1.55v. Or until max temps are reached. I personally don't like to go above 65-70 in prime95. thumb.gif
post #8 of 14
Also, is your ram Cosair Dominator? If so, you can set RAS# ACT Time : 18 DRAM Clocks to 15 instead of 18 and you can lower DRAM Voltage : 2.2 to 2.1v
post #9 of 14
Thread Starter 
Got things stable by the looks of it, running @ 3.61ghz based on your suggestion. Well under safe voltage for CPU, although temp is a touch on the higher side running Prime95 - currently max 73 degrees after 20 minutes. This is a touch too high you reckon?

Also my memory is XMS2 (CM2X2048-8500C5 x 2) - I got this to overclock sucessfully the E8400, seems pretty stable with Q6600 so far!
Edited by hyperjase - 1/28/12 at 11:51am
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post #10 of 14
Remember stress prime on the blend setting for at least 12 hours!
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