Just posted this on another thread where the guy was saying that he was going to flash his bois to overclock his 5850, which i found is not nessesary for my Sapphire 5850.
I did the following:
[RUN AT YOUR OWN RISK]
* Reset any CCC overclock
* Download MSI Afterburner http://event.msi.com/vga/afterburner/download.htm
* Install, run it, let it read your card profile
* Go to "C:\Program Files (x86)\MSI Afterburner\Profiles"
* Open VEN_1002&DEV_6899&SUBSYS_0B001002&REV_00&BUS_1&DEV _0&FN_0.cfg with notepad
VT1165_Defaults = 17 33
* Save that
* Go to C:\Program Files (x86)\MSI Afterburner
* Open MSIAfterburner.cfg with notepad
* Set EnableUnofficialOverclocking to "1"
* Save that
* Restart MSI Afterburner and you should be able to run the clocks up as high as you want.
* Dont change the corevoltage, my Core is 870, Memory 1220
* Save it as a 2nd profile, leave the stocks as the first profile
* In the properties, under profiles, set the overclock as the 3D profile, and set the stock and the 2D profile, this way it's not always running your overclock
* In the settings enable the fan user defined software control, and mine is set at the following: 20%:40C 50%:50C (set the fan speed so your card doesnt overheat)
* Also in the properties, start it with windows, and start minimized
Run FurMark to test stability/temps for 10-15mins (doesnt have to be fullscreen, 1024x768 is fine) http://www.ozone3d.net/benchmarks/fur/
Right now i have my 5850 at 870/1220 (stock was 725/1000, new clocks are past 5870 stock), its running at ~50C on full load during games. Works awesome.
Q6600 @ 3.2ghz
BFBC2: 1920x1200 everything maxed, 8AA, 16AF, novsync/hbao, 60-70fps average, i've seen it drop to 30fps when a UAV air strike hit my face and i didnt die