thanks for replies..
ive installed them both now.. and all was working fine, then after a shutdown on restarting PC the card had a red led light up on it and beeped quite a few times and I had no display after that.
Took it out, put it back in.. seemed ok.
then it did it again.
Ive since took it out, put it back in and come on here, so far, its working and the LED is off.
but do you have any idea what would have caused that?
im assuming it may happen again on restart.
I have an M-audio firewire 410 plugged in too, so that draws power, but all was fine when i had a 350W PSU in PC. (that was without the graphics card of course)