4 is plenty, just dont have a ton of chrome tabs open when playing games. 8 is still pretty much overkill, but is so cheap that it has become standard.
Thanks for the advice.
Is the 670 better by a significant margin than the 7870 in real world terms?
Also for any 670 owners out there, 630w 80 plus PSU good enough to run it and a i5-2500k on an overclock?