all i know is it came with my cooler master case a 6450 will be no upgrade since i have 8600gt now need it to play black ops 2 thats why
Well i wouldn't risk it but a 7750 is your best bet because a 6670 actually draws more power so my recommendation is it's better to be safe than sorry buy a new power supply first. If not go ahead and do it at your own risk it might work choice is yours of course good luck!
ok i willl get new powersupply with 2 12v rails at 18a each is that enough for hd 7770 or gtx 560, gtx 460, hd 4870 x2
Best answer selected by agasis.
Sounds good and thanks for best answer hopefully you'll be gaming and enjoying your new card very soon good luck!