Alright so here's what's working for my ASUS 4850 (Should work on other 4850's): - The Vcore was set to 1.158V which is the MAX aloud by these cards, any other bios with higher voltages are not correct. - I used the HASH of a ASUS TOP signature which allows the CCC max overdrive of 800/1300 while still having a valid ATI key. If you need anything higher I would recommend using RivaTuner as I'm not sure other bios (higher CCC values) are completely stable. - The fan settings have been changed, the temps I've been getting while using the automated overclock feature (currently at 790/1288) are around 77C. 100% fan usage at 90C while scaled down to 0% at 40C so it should be quiet while not in use. - I'm using the stock cooling for my card and no hard-mods (Vcore). Before the bios upgrade, my max Freq. for the core was 759 before a crash so some overclocking stability should be gained. I put this together in RBE v1.15 and everything works within CCC / No driver issues or problems. Things to remember while flashing: 1) Always have a spare video card, which may either use a different slot or be on-board. 2) Always BACK-UP your bios!!! 3) Have a boot-able USB drive ready with DOS, AtiFlash software and backed up bios. (I can get links for these and instructions if needed) 4) I've had many problems with winflash so I would recommend doing this in real DOS (not windows DOS). Hopefully everything works correctly, give me some feedback on these bios.