clocking 9550 on ASUS P5Q-E

[sybaris]

finally got the rig working.

However getting errors with windows 7 64bit.
Keeps stopping applications and sometimes BSODS.

Ran memcheck and at overclocked settings it shows errors.
At stock settings memcheck shows no errors and windows runs like a charm. No more BSODS.

I am totally clueless on how to calculate RAM settings and just use the trial and error method. Can anyone help?

Upped fsb to 411
NB Voltage to 1.26
SB Voltage to 1.10
PCIE SATA 1.5
DRAM Voltage 2.2 (Kingston Hyper 4 x 2GB 1066)
FSB Term 1.2

CPU and PCIE Spread Spectrum - Disabled

Getting the following temps

On Load on Idle
Core 1 51 max 38 max
Core 2 40 max 35 max
Core 3 42 max 38 max
Core 4 47 max 38 max

I did change the DRAM frequency to 1069 (there is no 1066. there is a 1006 though)
and manually set the timings to 7-7-7-20 as per the sticker on the RAM

When I pushed the FSB up to about 470, I found that win 7 pro 64 threw a wobbly when booting and kept trying to run a repair. Dropped the FSB back to 411 and all was ok.

Can anyone advise pls?

 

[paradisiac]

have you tried memtest with ram on auto and cpu overclock?
also, im unsure as to when you mean with no OC it passes memtest means without any ram changes aswell as cpu, if so have you tried leaving the cpu settings at stock and running memtest with the ram changes and see which part is causing the BSODs, might be you need to underclock the ram to get a better cpu overclock.

 

[LEUVEN]

With a FSB of 470 thats going to be 4GHz which is too much for stock v.core.

 

[sybaris]

I tried lowering the fsb down to 3.7Ghz

have you tried memtest with ram on auto and cpu overclock?
Yep had errors.

When I leave CPU and RAM at stock settings, everything works and memtest shows no errors.

I think it could be how I am altering the RAM settings, but I don't exactly know what I am doing, except for adjusting the voltage.

 

[paradisiac]

if you are getting issues then i would start with getting the ram stable first.
so set cpu to stock and ram to its rated speeds/voltage. if that errors go down, so if its 1600MHz drop to 1333MHz, if its 1333MHz drop to 1066MHz, if its 1066MHz drop to 800MHz and see if thats stable. i wouldnt even touch the cpu until you have stable ram.

 

[pastymuncher]

May i refer you back to the original thread? There are loads of good settings in there.

You select the ram speed from the drop down box. No need to calculate the ram to fsb as it's all done for you. When finding the max cpu overclock you always want the ram running at or below it's speed, never over. Once the cpu is stable then you can sort out the ram. You are definately going to need to raise the vcore but do it in stages. Raise the fsb in increments to find the most your cpu will do on stock voltage (mine did 3.65Ghz before needing a bump). Then increase the vcore a notch or two before increasing the fsb again to find the max for that voltage. Keep doing this until it will clock no more. Just remember that everytime you increase the fsb you are also increasing the ram speed so will need to keep adjusting that too.

 

[sybaris]

So just to check I follow you,
Drop the RAM from 1066 to 800 and then keep pushing the FSB until it becomes unstable and only then notch up the vcore? Then as the fsb increases, keep dropping the RAM back down below 1066?

 

[paradisiac]

So just to check I follow you,
Drop the RAM from 1066 to 800 and then keep pushing the FSB until it becomes unstable and only then notch up the vcore? Then as the fsb increases, keep dropping the RAM back down below 1066?

pretty much yeh. then once you have a 100% stable CPU OC then you can start looking at getting more from your RAM.