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

[Mungri]

I got some results at last for my Xfire 5770s

The CPU is running at 3780 Mhz with turboboost, and the vga ram is at stock speed of 1200 Mhz in each run.

GPU @ 850 Mhz, P14690

GPU @ 900 Mhz, P15578

GPU @ 960 Mhz, P16124

They seem to respond really well to GPU increases, just hope I can unlock the upper limit to 1 Ghz and up soon. I'll be increasing the ram speed next.


Keeping the GPU at 960 Mhz, and increasing the ram:

Ram @ 1250 Mhz, P16797

Ram @ 1300 Mhz, P17020

Performance decrease at 1350 Mhz ram - P16773 (I tried two runs, similar result both times).

Ram @ 1445 MHz, P17215

It makes no sense overclocking the ram beyond the rated speed of 1250 Mhz, the gains above this frequency are pointless, but overclocking the GPU on these is good.