Thanks guys for the replies, to be honest I'm not 100% certain it is the cpu, but as all other hardware worked flawlessly in the old mobo that was a logical conclusion.
More likely is issues with the horrible socket 775 motherboard pin system, I hate it, much prefer the pins on the cpu. Also I have installed my Zalman 7000b CU cooler, and temps
are idling at 37 each core and everest also reads 29 for the whole cpu, not sure how that works. I have run Super Pi no problems at all up to 8m, so that normally craps itself when
Ram or cpu are unstable.
As I mentioned occasionally a blank screen at boot up and nothing else, also happens (ctrl,alt,del), and windows restart, but it is random
I've done some poking around the web, and it seems the E5200's have a default voltage of anywhere from 1.125v up to 1.2v, so I would say there is a possibility that the low voltage, depending on
the quality of regulation, might cause it to struggle under load. It's also possible that the bios I have installed (2.11a) still has some later revisions to come that might give better stability to these processors.
My ram ran perfectly with memtest at 227fsb 2.3.2.5 at 2.85v on the old mobo, but the prob has occurred with all stock settings, and the ram is rated at 2.3.2.5 at 2.5v
Is there a post or thread that gives voltages to all the dram, agp, low,normal. and high settings.
I'll try disabling the pci downstream pipeline in the bios, but would like to know what voltages my agp card slot will be running at on high, as my old mobo I set it to 1.6v was fine there.
Another user here, Razgrizo, seemed tohave similar issues and Rma'd his board then all fixed, so I'll wait and see.
BTW, I got 10550 out of 3dmark06 and best superpi 1m run of just over 20secs, not too shabby, best time old cpu managed was 26.9secs at 2.8ghz.