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
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
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