Quote Originally Posted by Kuntz View Post
No, I think the memory timings are static, they do not change with memory adjustment. So if they are at, for example, a total cycle delay of 10, that would mean:

10 cycles @ 1200MHz = 8.3ns delay
10 cycles @ 1300MHz = 7.7ns delay

Because there is no memory bottleneck on the 5870 cards, when you increase the memory speed, all you are really doing is decreasing the nanosecond delay on memory operations, which is why a 10% increase in memory speed is only getting a 1.5% increase in performance.

How would you explain all these performance increases from memory overclocking that are greater than 1.5% per 100mhz?

Quote Originally Posted by jaredpace View Post
850 / 3600 / 091.7 / 0 / 0%
850 / 4000 / 095.2 / +3.5 +3.8%
850 / 4400 / 097.9 / +2.7 +2.9%
850 / 4800 / 100.3 / +2.5 +2.5%
850 / 5200 / 102.4 / +2.1 +2.1%

850 / 4400 - 40,9 - 0 / 0%
850 / 4800 - 42,0 - +1.1 +2.7%
850 / 5200 - 43,1 - +1.1 +2.6%

785 / 4400 - 39,3 - 0 / 0%
850 / 4800 - 42,0 - +2.7 +6.9%
900 / 5200 - 44,7 - +2.7 +6.4%

850 / 4800 - 31.6 - 0 / 0%
850 / 5272 - 32.3 - +0.6 +2.2%
And this?

http://www.firingsquad.com/hardware/...ing/page10.asp

Is this because of the latency of the memory (in nanoseconds), and not due to increasing bandwidth for chip's computational throughput?