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Q6600 G0 w/ Asus P5k-Pro not doing well OC'ing

post #1 of 11
Thread Starter 
Hi guys,

This is my first post here but been looking around a while, lots of good info on oc'ing. I finally decided to do a mild oc on my rig, I got the RAM stable at pretty low timings but for the life of me I can't seem to find a good overclock on the q6600. It will pass OCCT but not prime95. Usually get a blue screen and a reboot. I've been trying so many settings over the past week and looking at other's overclock settings but they don't seem to work for me. Anyways, here goes with the settings+

Multiplier: 9
FSB Freq. :333 (I upgraded Bios yesterday and got a new option to change this to 400 Mhz also, any difference with this or just leave it as is?)
PCIE: 100
Vcore : 1.33750
CPU PLL: 1.6
FSB Termination: 1.4
NB: 1.45

FSB Speed : 1340mhz

RAM:

Corsair Twin2x2048-6400c4 DDR2
4-4-3-9-3-42-6-3-3 @2.1v


Ram has passed Memtest multiple times (38!) running at 800Mhz with these timings so I should be ok on the Ram, except for the 42 clock cycles, how low can I go on that or is it again trial and error time?


So my question is as follows, do I choose 8x400mhz for the 3.2 which suits my ram at 1:1 or lower the multiplier to 9x372mhz for a little higher speed. I found the settings for the 9x372 at bit-tech, when they did a review on their q6600 but using their following settings, I can't get it stable no matter what* ( by stable i mean running occt and then prime95, most of my oc's will boot into windows)

Their OC Settings:

vcore : 1.4625
CPU PLL: 1.7
FSB Termination: 1.4
NB: 1.55

I've got plenty of air running through the case with huge aftermarket cooler, so no problems with the temps, I just need a stable overclock around the 3.2~3.4 mark, I dont want to push it to the limits.
Also, with the 8x400 = 3.2Ghz overclock, I see weird readings in cpu-z and all other diagnostics, seems to slow down my system instead of speeding it up. One final note, my rig wont hit 3.0 ghz with stock voltages, maybe the asus board does really suck that bad but thats what I have so oh well. Any help would be much appreciated, apologies for the long post with multiple questions, thanks again.

Waruta
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post #2 of 11
Well the first thing I noticed is that your vcore is much lower than the vcore used to achieve the higher OC... now unfortunatly I don't own and I have not OC'ed a quad before but I would suspect that to achieve to OC's your going for you will need more vcore... (but like I said I am no expert )
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post #3 of 11
I have mine set at 9x378 with 1.4 vcore and it runs prime95 stable on all 4 cores for 11 hours.. granted I have a different board but it looks like you should be able to handle it with your board
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post #4 of 11
Quote:
Originally Posted by thenailedone View Post
Well the first thing I noticed is that your vcore is much lower than the vcore used to achieve the higher OC... now unfortunatly I don't own and I have not OC'ed a quad before but I would suspect that to achieve to OC's your going for you will need more vcore... (but like I said I am no expert )
he's right you do need more vcore
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post #5 of 11
Thread Starter 
Thanks for the replies. I'm trying out 1.4 vcore now, under load shows 1.35 , 1.352. 1.325 in cpu-z, speedfan and core temp respectively. stable in occt and trying out prime 95 now. Just got back from lapping the core and cooler, I'm under 50C at load! yay. Used to be high 60's due to the amount of dust in my system as well as the crappy chrome plating on the copper cooler. Currently running at 9x360 = 3240Mhz, RAM @ 4-4-4-10 2T. Once I pass prime probably going to lower it back to the 4-3-3-9. Any suggestions with the RAM timings (the 42 clock part of 4-4-3-9-3-42-6-3-3 @2.1v) or do I go back to trial and error? Thanks again.

*drumroll please* http://valid.x86-secret.com/show_oc.php?id=333771
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post #6 of 11
Quote:
Originally Posted by waruta View Post
Thanks for the replies. I'm trying out 1.4 vcore now, under load shows 1.35 , 1.352. 1.325 in cpu-z, speedfan and core temp respectively. stable in occt and trying out prime 95 now. Just got back from lapping the core and cooler, I'm under 50C at load! yay. Used to be high 60's due to the amount of dust in my system as well as the crappy chrome plating on the copper cooler. Currently running at 9x360 = 3240Mhz, RAM @ 4-4-4-10 2T. Once I pass prime probably going to lower it back to the 4-3-3-9. Any suggestions with the RAM timings (the 42 clock part of 4-4-3-9-3-42-6-3-3 @2.1v) or do I go back to trial and error? Thanks again.

*drumroll please* http://valid.x86-secret.com/show_oc.php?id=333771

Congrats But surely you will be pushing it some more As for memory... I have not had the privilage of messing with my RAM as my mobo is the sucks... so I haven't read up on it that much but I am sure the info you seek is lurking somewhere in a thread around here...
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post #7 of 11
I have the p5k pro and it works fine am on @ 3.06 ghz stable.

1.35 V core

but i want to push it to 3.2 or 3.6 i think my ram is holding me back..
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post #8 of 11
Try to use a different divider. That helped me achieve higher overclock with less voltage too.
    
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post #9 of 11
Quote:
Originally Posted by elko View Post
I have the p5k pro and it works fine am on @ 3.06 ghz stable.

1.35 V core

but i want to push it to 3.2 or 3.6 i think my ram is holding me back..

It would be better if you started your own thread instead of reviving a 9 month old thread.
However to answer your question, your voltage is most likely what's holding you back. It's OK to go as high as 1.5. Try at least 1.4 to get to 3.2.
What RAM is it? Could you post a link of it?
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post #10 of 11
My ram is


http://www.corsair.com/_datasheets/CM2X1024-5400C4.pdf

Not sure if i can go 800mhz with 5 - 5 - 5 -15 - 15 and 1.4v , FSB 356? With a multiplyer of X9
Edited by elko - 11/22/08 at 6:11am
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