Hi,
Don't despair m8,
Do remove the power supply lead, when you remove the cmos battery, and put jumper on pins,
leave for a fag and tea,
Down load mem test here, burn to cd, and reset boot to cd, run for a few hours and any memory errors will be shown, but you got to get into bios first
You could have a duff cmos battery, should be 3.0+volts, rare on a newish board, but hey
You may have to use a ps/2 keyboard and mouse instead of a usb one!!!!
If all else fails you MAY have a dodgey mobo and have to RMA it with ebuyer, (there is a 3 year warranty on the mobo),They are very good, I bought a lot of gear from them, ring them and have a chat,
Or request an rma from gygabyte uk, cost you a tenner for return p/p, Quicker return as well
Tis difficult to rectify some faults over the web,
But hey we've learnt a lot,
And tell your partner your repairing it yourself to save the dosh for some new shoes for her
, (duck incoming)