Thanks for all the help.
Turned out the issue was one of the power connectors wasn't plugged in (*ahem*).
Had another problem - couldn't get the stock heat sink to connect properly so the cpu temp starts at about 70 and keeps rising until it turns itself off. I think I need some sort of hydraulic system to push the pins in. Just wanted to moan about that.
Thanks again for the help,
Matt
Turned out the issue was one of the power connectors wasn't plugged in (*ahem*).
Had another problem - couldn't get the stock heat sink to connect properly so the cpu temp starts at about 70 and keeps rising until it turns itself off. I think I need some sort of hydraulic system to push the pins in. Just wanted to moan about that.
Thanks again for the help,
Matt