OK, while the case is open look at the BIOS chip
I can't find the BIOS chip but the MOBO spec says it's using AWARD BIOS.
As for the RAM, I'm using GSkill Ripjaw 1600Mhz DDR3 (2x 2GB).
Just noticed in the Mobo manual that is says it supports DDR3 of 1866, 1300 and 1000.
Could this be the problem?
(Also tried using different RAM slots etc Previous DDR2 RAM is not compatible with this mobo)