I have that same card but only with BFR memory, so my advice is a guess, but yes, what you wrote is what I would try first. Keep in mind that it is a risk. My advice has no guarantee and you might brick your card. Since that card has no second BIOS, it is a risk that you have to decide upon. I personally would try it, but then again I know how to jumper a BIOS physically and boot into program mode and reset it using a USB windows 98 boot to DOS. Good luck.
i flash the bios ,,when ming start the pc get the bluescreen,, so it can not work with that edit
Okay, that was the natural thing to attempt. Next try this:
For each of the strings that begin with F0 49 02, (AFTER the next characters that are 01, or 02, or 03) replace with the following:
7771332000000000CECD5939805511112E1589080048C60022339D086C0014206A8900A00200312
0140F262B88252F15
That is the string from my XFX 280x Hynix AFR modded. Of course, after editing, reopen the file with VBE7.0.0.7b.exe to correct the invalid checksum.
Run the miner at 1000/1500 1150vddc first until it proves stable then you can likely set it at 1050/1500 1125 vddc.