HOW TO FLASH ASUS BIOS + TOOLS NEEDED
Did you do it from a DOS boot disk?
Edit: tried from DOS and it says no ATI device found using version 4.07.
Following the techpowerup guide does work but it links to the wrong atiflash (older version), and the command to flash is missing the -f switch.
I have spent a bit of time today finding the correct atiflash and some bios files and have put them all together into a zip file you can grab here:
http://sdrv.ms/1c9DpWB
Unzip that and you will have all the correct bits needed so you can follow TPU guide:
http://www.techpowerup.com/forums/showthread.php?t=57750
You will need an empty USB stick (the HP tool will format it). The win98 boot files are included in my zip file, you need to direct the hp tool to use them.
Before performing the flash I went into the AMD OverDrive control panel and set it back to defaults and unticked 'Enable Graphics OverDrive'. This meant I was back to stock and minimised risk of any problems when it booted back up with the new bios.
Once booted into the USB stick with the files copied you can get flashing! Firstly I ran the following command:
atiflash -s 0 backup.rom
This gave me a copy of my sapphire bios incase I want to reflash in future, or any problem occurred with flashing the asus bios. I have included this bios image in the zip file above (sapphire.rom).
You then are ready to flash the Asus bios as follows:
atiflash -p -f 0 asus.rom
If you don't use the -f switch you will get an SSID check error and it won't go through with the flashing. If you have multiple cards you just need to run the command again, incrementing the number until all your cards are flashed.
Reboot, remove USB stick and you're done!
Now you will need to use Asus GPU Tweak software to do your overclocking, as far as I am aware MSI afterburner doesn't work properly with this card yet - haven't even tried it myself. You can get it direct from Asus here:
http://support.asus.com/download.aspx?SLanguage=en&m=gpu+tweak&os=30
I've got mine running at 1150 core & 6000 mem @ 1.350v. Make sure you always have the power target slider set at the max of 150%, to ensure that the card can draw the power it needs when required.
Hope this guide helps! Will also post this as a new thread in the graphics cards section (if there isn't one already) as I see many people asking how to flash across many forums. The Asus bios rom is from Gibbo so many thanks to him for getting hold of it for us