Hi notbatman.
Thank you for the modified bios and giving me the benefit of the doubt that this sucky card exists.
I was able to download the bios you posted on pastebin saving it as a uue file.
I used winzip to extract it as 7zip complained about errors opening you uue file.
I extracted the 7z file and opened that with 7zip.
I was able to extract the bios rom you provided.
Before flashing, I first reset to default settings on AB and Trixx and flashed with atiflash.
I then did full shutdown and cut power to the rig.
Rebooting, I again reset defaults with AB and Trixx.
core clock now defaults to 900 and mem clock defaults to 2250.
I tried applying undervolt via Trixx but its not working.
Result:
No change in hashrate: 24.7Mh/s
Slight drop in power use from 71.5w to 70w according to gpuz
Lots of memory errors according to hwinfo. more than 50k in 3 minutes.

did you also use pbe 1.6.2?
the bios rom you provided uses the same timings as my current modified bios.
as far as I can tell, mem voltage was dropped to 880 from 1000 default.
max gpu freq was dropped to 1100 from 2000 default.
can you share what else you changed?