Overclocking Q6600 on a Asus P5Q Pro Board?

ChrisGTL

ChrisGTL

ChrisGTL

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I'm writing this on behalf of a friend who doesn't have internet access at moment, so bear with me please.

He has a Q6600 and just upgraded his motherboard from an Nvidia based chipset to the Asus P5Q Pro motherboard with the Intel chipset. Also has 4x1GB Geil GX22GB6400DC modules (800Mhz DDR2 CAS 5).

He has top end air cooler, solid branded PSU (600w I think) and a PCI-E 460GTX.

Now, after he did lots of research about good overclocking motherboards he went for the P5QPro - installed it all and straight away got to be stable at:

400FSB x 9 Multi @ 1.425v

If he tries to go anything above 400Mhz FSB he gets mem dumps when windows starts to load.

He has tried bumping the RAM volts up to 2.1 without success and even tried relaxing the timings from 5-5-5-2T.

Is he doing anything wrong? Can't you lower the FSB:RAM ratio on these boards so you underclock the memory?

Any help would be appreciated.

Cheers
 
Correct. You've pushed it beyond 800MHz of the pc2-6400.The lower RAM freq selected may be an underclocked memory but the bus and clock speeds are faster. You could opt for some PC- 8500 and set the memory to asynchronous so the RAM can run at the higher speeds.

Got the same setup.

for 3.4Ghz

AI Overclocking: Manual
PCI-E Frequency: 100MHz
DRAM Frequency: 750MHz (1:1)
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
FSB Frequency : 376MHz
vcore : 1.4250v
VDIM : 2.1v

for 3.6

FSB Freq : 400
DRAM Frequency: 800MHz (1:1)
vcore1.450 (try a little more if that fails)

3.6GHz CPU with syncronised memory @ 800MHz :)
 
Admiral Huddy said:
Got the same setup.

for 3.4Ghz

AI Overclocking: Manual
PCI-E Frequency: 100MHz
DRAM Frequency: 750MHz (1:1)
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
FSB Frequency : 376MHz
vcore : 1.4250v
VDIM : 2.1v

for 3.6

FSB Freq : 400
DRAM Frequency: 800MHz (1:1)
vcore1.450
Click to expand...

Are you able to change your DRAM Frequency: 750MHz (1:1) to something else or is it locked?
 
Shouldn't be locked if manual is selected, it's under the DRAM settings. I'm not on my own PC at mo otherwise i'd get some screens up.

Should be a list of frequencies based on the ratio and bus frequency selected.
 
With 4x memory sticks, youll also need to increase the north bridge voltage a touch. Due to the extra strain on the memory controller.
 
will keep an eye on this thread as been meaning to overclock my q6600 on the old asus board, did try ages back but struggled to get it to OC at all
 
I think I understand his problem now.

When he goes to 400Mhz FSB on his 800Mhz RAM he can't downclock his RAM anymore (800Mhz is the lowest DRAM speed option in BIOS). He only has options to overclock the RAM.
 
You can alter the FSB Strap to something like 333 and this should change the DRAM Frequency too. Although I remember my P5Q had issues at anything over 400FSB too, even if I lowered the Multi, it would just BSOD.
 
i thought that, there is usually a way to change the ratio of ram with the fsb.
just had a look at the manual Huddy said above.

"3.4.3 FSB Strap to North Bridge [Auto]
When set to [Auto], the FSB Strap will be adjusted automatically by FSB Frequency and DRAM Frequency. Congifuration options: [Auto] [200 MHz] [266 MHz] [333 MHz] [400 MHz]"

changing these will change the ram speed as well
 
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