I have just built a new media centre in antec isk case using a GA-H67N-USB3-B3 with an intel i3 2100t and ssd drive for boot. I have some serious issues however with the build 
Installed win7 professional on it and then ran perfomance test when loading 3d textures system hung and just get coloured flashes on tv (using the hdmi port). Managed to get it to do the test by dropping my ddr3 1333 down to 800. However after anywhere between 5 minutes and 2 hours same thing happens again and only option is to power off and on again.
Thought perhaps it was my memory so bought some 1.5v crucial ddr3 1333 - again having same issues anywhere between 5 minutes to 3 hours , looks like the hdmi output goes screwy and then locks up whole PC. I have tried 2 different tv's now as well as different hdmi cables , and even 3 different psu's
I am running F3 bios - does this sound like a DOA system board or is there a beta bios that may fix this ??

Installed win7 professional on it and then ran perfomance test when loading 3d textures system hung and just get coloured flashes on tv (using the hdmi port). Managed to get it to do the test by dropping my ddr3 1333 down to 800. However after anywhere between 5 minutes and 2 hours same thing happens again and only option is to power off and on again.
Thought perhaps it was my memory so bought some 1.5v crucial ddr3 1333 - again having same issues anywhere between 5 minutes to 3 hours , looks like the hdmi output goes screwy and then locks up whole PC. I have tried 2 different tv's now as well as different hdmi cables , and even 3 different psu's

I am running F3 bios - does this sound like a DOA system board or is there a beta bios that may fix this ??