*** Official Radeon HD5800 Series Overclocking Thread ***

[Mungri]

That is exactly what I thought, that these cards were bandwidth limited so the ram increases should have helped, but they dont. It seems to be overclocking the GPU on them that makes them a lot better. I would like to be able to get them to 1 Ghz.

I think the ram timings mess up above 1300 Mhz or something, because something causes it to loose prformance at 1350 Mhz.

I'll look for the Far Cry II benchmark now, I dont play FPS games but will see if I can get the benchmark. I've kept the cards clocked at 960 / 1300 for to test for stability in games, and they've been fine in a few MMO's, but I had to increase the voltage slightly from 1.13v to 1.16v to stop the display driver from crashing.

I think the 5770 is currently so much slower then the 4870 due to immature drivers, at least overclocking it brings it up to par with the 4800's somehow. One way to test would be underclock a 4870's ram down to half the clock of the 5770 so both have the same bandwith, while underclocking the 5770 GPU to the same as the 4870, but my 4870's are already wrapped up ready to post so Im not doing that.

Seems like I cant get the FC2 benchmark without buying the game, so I cant do that.