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Overclocking Quad Core Q6600 Woe's Updated

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May 7, 2007 12:55:32 PM

My aplogies for the loaded post, but might help some people with a
quadcore and asus p5n-e sli board.

I put together a new rig, based around intels q6600 chip and asus p5n-e sli mainboard. Some patriot ddr 2 800 memory 4-4-4-12 timings,
and an nvidia 8800GTS graphics card. Also a Tagan 580 watt PSU.

I also flashed the bios of the mainboard to version 401.

Had to use a stick of old memory to get the system to post, the asus p5n-e sli mainboard seems to be picky about the memory you use, voltage
was the problem here, the patriot memory needs the extra volts to boot
if you occupy all 4 DIMM banks, it will boot with 2 slots every time though
the ones that are black in colour.

So far its overclocking has been absymal with stock cooling , i cannot get this board to work higher than 290 fsb with any stability. This gives a cpu speed of 2.9Ghz.

At 295 fsb the system wont even post on stock air cooling. It will freeze
before allowing you to enter into the bios.

This requires a voltage boost on the cpu core to 1.375 and a boost
in voltage on the northbrige to 1.55.

(Update, 1.375the bios lies in reality the real voltage was 1.29-1.31 so no really boost at all.)

Boosting cpu voltage to 1.4 and northbrige to 1.7 does not help,
1.4(only 1.3-1.33 monitored by speedfan. bios lies.)

The cpu idles at 36oC and hits 68oC on load using stock cooling.

Considering that the water cooling only gave me another 100Mhz, i have to conclude the cpu is really tolerant of high temps.

pdate! Water cooling added, helped a bit.
-----------------------------
I've been busy putting together a nice watercooling rig for this chip,
comprising a triple rad 3 X 120 ys-tech fans , custom water block and
AlphaCool AP1510 centrifugal pump.

This has helped somewhat... Ive also read hundreds of posts about the
asus p5n-e sli board. Ive found disabling everything on the board that i dont need has allowed the memory to reach its rated 800Mhz speed at 4 -4-4 -12 timings but not much more, still its a vast improvement over 667.

The fsb now runs stable at 333Mhz for an below average overclock to 2.99Ghz. Its not prime stable / looped sisoft sandra at 340Mhz or above but will boot at 366fsb.

Temps are good now, idle is 23-26oc depending on core and load is
low 40's. If i overvolt fans and pump to 18volts i can push the load to high 30's again varies with the cores.

Voltage core is set to 1.5 volts, but monitored as 1.44-1.45.

Northbridge is 1.55ish and gets to 35oC with a bolted on 80mm fan.

Run out of ideas pushing for more, higher northbridge and cpu volts allow
higher speed but not with good stability.

Relaxing the memory timings to 5-5-5-12 dosn't help.

At least ive reached a stable, normal operating speed of 2.99Ghz on 4 cores. I wish i had 3.3Ghz though :) 
May 7, 2007 2:06:41 PM

Quote:
My aplogies for the loaded post.

I put together a new rig, based around intels q6600 chip and asus p5n-e sli mainboard. Some patriot ddr 2 800 memory 4-4-4-12 timings,
and an nvidia 8800GTS graphics card. Also a Tagan 580 watt PSU.

I noticed the northbridge and southbridge getting hot, so i added
a small cpu fan to the northbride passive heatsink and a small heatsink
to the southbrige and lots of case cooling, the temps are quite good now.

Still using the stock intel cooler since it seems to be doing a good job.

I also flashed the bios of the mainboard to version 401, to get it
to recongnise my memory.

Had to use a stick of old memory to get the system to post.

The asus p5n-e sli mainboard seems to be picky about the memory you use, i still cannot get it to work stable at its rated 800Mhz but only at 667Mhz, often windows vista will hang on startup at above 700.

I made sure that the memory is getting its 2.2 volts needed, it is not even warm to the touch.

So far its overclocking has been absymal, i cannot get this board to work
higher than 290 fsb with any stability. This gives a cpu speed of 2.9Ghz.

At 295 fsb the system wont even post, i seem to be pretty much at the max of the cpu?. Ive heard this board does 330+ stable.

Even this requires a voltage boost on the cpu core to 1.375 and a boost
in voltage on the northbrige to 1.55.

Boosting cpu voltage to 1.4 and northbrige to 1.7 does not help.

The cpu idles at 36oC and hits 68oC on load is this too high?

Have a got a stinker of a cpu? :cry: 

Anyone else got this mainboard/cpu overclocking and getting good results?


dude, I have no clue what you're bitching about 2.9 Ghz on a quadcore is amazing..
and yeah, these temps look scary, and since you didnt used water.... Its not a surprise..
so stop expecting you to get 4 ghz quadcore, as far I know, thats only possible on a dual core.
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May 7, 2007 2:38:00 PM

u r whining about u cant get higher with a stock cooler? 2.9 ghz on a quad is pretty high with the stock cooler.. try a tuniq or a thermaltake 120 and u will see wonders.
May 7, 2007 2:44:20 PM

Just becasue it over clocks does not mean you have to. Be happy with what you have which at stock IMO is more than enough cpu power.
May 7, 2007 2:52:43 PM

Thanks guys, you've cheered me up :) 

Im glad you think the high temp is the problem, at least thats easy to fix
time to go shopping for better cooling.
May 7, 2007 2:55:22 PM

..wait..your overclocking on a Stock Cooler? and your going to complain about temps?

YOUR USING A STOCK COOLER FOR CHRISTS SAKES
May 8, 2007 1:24:13 AM

he was complainnin about not being able to hit 330fsb :[
!