Quote Originally Posted by Chickenfeed View Post
The 480 improves substantially more with clock speed increases than the 5870. The difference of 850-1000 on a 5870 is 5-10% at *best*. A minor overclock on a 480 exceeds that noticeably.

They did a good comparison at alienbabeltech
Oh really!?!?!?
Overclocking both the core and memory by 9% brings a 7-8% increase in performance, a few cases ~5% but more cases than that +10%.
Core clock increase of 9% brings usually ~4-5% performance increases or roughly half the clockspeed increase.

While GTX480 with ~18.5% increase to the core/shader clock usually brings a 5-8% increase in performance, with a few cases being ~10%. So at best roughly half the increase to the clocks but in most cases about 1/3.

http://www.overclock3d.net/reviews/g...tx480_review/8 (used the average FPS numbers)
http://www.firingsquad.com/hardware/...ng/default.asp