Thanks for the advice there Brian. After the attempted bios flash, my system now starts up then stalls just before windows loads up. All I get on the top left is a flashing cursor. However, after a soft reboot (Ctrl,Alt,Del) it loads properly and still runs ok. Tried having a look at the bios and nothing seems out of place. I guess my system is that old even the bios can't be updated (A03). Oh well, at least it's still running. Also, with the spikes, a friend suggested running the game without SLi using just one GPU and guess what? It worked! What I can't work out is why Alienware built the M17x with 2 GPU's but a powersupply that's too weak to run them both at the same time under heavier conditions. With the one card running, I was even able to increase some detail levels and have no performance hit at all. Stoked!