Right I have had over the past week or so issues with my motherboard, pc will no longer work properly so just checking if anyone else can think of anything to try...
Issues:
PC does not always POST, half the time it will have beep fast continuously (no POST code available for motherboard, I have checked)
WHEN it does post, the BIOS screen only gets as far as the memory testi, then it wont display more, it sometimes doesn't render the characters properly. goes back to 'normal' behaviour about a minute later completing the BIOS screen
Takes a VERY long (as in over 5 minutes) to boot into windows 7
When it is in mouse clicks and text entry lag REALLY badly, as in up to a minute
Randomly locks up completely during work, seems to be random and not just under load etc.
I have tried:
New memory (known working memory in every slot) and tested other memory in another pc, memory works fine, single stick doesn't fix the issue.
Resetting the BIOS/CMOS reset
Different USB ports for peripherals
Going to try:
Going to try it with no drives connected
going to try a different graphics card
Going to try a different PSU
I think it's pretty FUBAR on the motherboard though, after a BIOS reset (and manually setting the memory speed to 333/800mhz in the BIOS it would boot at 816mhz and really bad timings)

_________________TwitterCharlie Brooker:
Macs are glorified Fisher-Price activity centres for adults; computers for scaredy cats too nervous to learn how proper computers work; computers for people who earnestly believe in feng shui.