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1:1 is the divider I dont think your board would put it in the bios 2 times, bsod is usually memory, check and see what clock its at. if its higher than stock due to oc up dram volts. leave the multi at stock and then oc with fsb, if you hit a fsb end ad multi.
have you locked your pci bus at 100 mhz?
if the pci bus is not locked this could cause the system to freeze when doing FSB OCs
I would definately advise against going higher voltage on your memory unless it is rated for 2.2v
doing this will cause the ram to get quite hot and you will probably need to add active cooling to the ram
and IIRC 52C idle for this cpu is quite a bit above where people like them
Finally your stress test does not appear to be affecting all your cores. Usually if you are stressing all of your cores, the temps are within a few degrees of each other. Yours however have as much as 6-9C difference. This would seem to indicate that you are only stressing 1 core
good luck with your oc
I think I know the problem, you have 4 1 gig sticks thus puting more stress on the memory controller. I am prety shure you need to up the north brige volts, and active cool your ram. that might fix the problem. also you dont have to yous a 9 multi, you can yous 11 if this dosent get fixed. by increasing fsb your ram was increasing speed, it might have over heated or the the ram controller was over loaded and needed more volts(I am prety shure the nb controls the ram stuff) making you only be able to oc with multi. you should also feel the ram and nb/sb to see if they are over heating.
you should be able to yous all of your ram just acive cool it by puting a fan on it, the other 2 sticks might be bad though. and the pic of the ram or what ever is not showing.
Do yourself a favor and get an Intel chipset this time. P35/X38.
They OC quads much better!
I recommend the Foxconn P35 MARS.
You won't be able to run SLI w/ the P35/X38's, but SLI can be frustrating anyway.
You'll be happy w/ a single-card solution like you already have, and the Intel chipset boards OC much better, & run much cooler.