And for people like DARKSF who wish to try and get a bit more from their 5900XT, the attached Darksf_02.zip file contains 2 modded bioses. One is a Aopen 5900XT which many people have found excellent; and the other is a BFG5950U type just for those who would like to try going up market. Both bioses have a relaxed Latency mod to improve memory overclocking/performance and have also been set to run at 300/425/800 (2D/3D/Mem) ---> which are levels that most 5900XT type cards should be capable of running?
Obviously you can change the Bios's default speeds to anything you want. However, you should only consider increasing the Bios's Core/memory speeds after you have established your card's Max STABLE overclock capabilities.
And when overclocking your 5900XT, or any vga card for that matter, it is very important that you also give consideration to upgrading your cards heatsinking. Otherwise your selected overclocks may not run stable; especially during Gaming, etc?