[hellcamino]

Originally Posted by skarface

So what if there is an issue during flashing? Will the card be toast like a mobo would be?

Rule #1 for flashing bios on any device : ensure your pc is stable BEFORE flashing.

Rule #2 Do NOT flash your pc during thunderstorms or any other power outage likely situation.


I copied this from i4 memory's forum written by T M:

Share the tips and tweak for 4870X2 which can be a real ***** to tame.
My comments will mainly be regarding CF two cards.

Max clocks limit - CCC checks the digital signature of the BIOS vs the clocks being used, if mismatch then video card no longer functional

Default Bios max clocks limit = 800/1000
Master: Grab your own using GPU-Z
Slave: Grab your own using GPU-Z

Asus TOP Bios max clocks limit = 900/1000
Master: http://www.mediafire.com/?48xsfx13bzx
Slave: http://www.mediafire.com/?k2l1dhn3m3m

To beat the clock limit, you can simply uninstall CCC (leave the driver)
If you wish to change CF or settings in CCC, just reinstall with the cards flashed/set down again and then afterwards uninstall again
Works awesome and my cards both run at 830/1020 on air

Adjusting clocks:
CCC - you must adjust each "card" seperately, and it wont look like it works for most cards but it does

Flashing:
Grab your default BIOS's using GPU-Z and save them using 8 characters or less for filename
Open Radeon Bios Editor (RBE) and edit the clocks/volts/fan as you see fit.
Save modified file with a different file name and 8 or less characters.
Flash in DOS using ATIFlash:

Master:
ATIFlash -p 0 "BIOS0".rom

Slave:
ATIFlash -p 1 "BIOS1".rom

If you are flashing your default card to Asus TOP, you will need to add -f to your command before the -p to force the flash.

More to come later.


Link to OP http://i4memory.com/f18/4870x2-overclocking-9747/


I recommend just flashing to the Asus TOP bios, they will leave you some headroom for overclocking and get you a little more familiar with the proccess with the least amount of hazard. I am using TOP bios on my 4870X2's without issue and if by chance you do have a problem you can always adjust your clocks back to stock or flash the cards back to stock.