I wonder is there anything for 280x with hynix BFR memory.
Seems no one done for those.
Just ask ... will always mod for you

Download
https://drive.google.com/open?id=0B6R3UoULhg3cbWYwVlYzNmUtSGcModded with straps from 1250MHz --> 1375MHz , 1500MHz (1500MHz Should kick ass - ~80+ sols/sec)
p.s.1 - Flash with AtiFlash.exe from command prompt, atiflash -f -p X rom_name.rom , x = card number given by atiflash -i
p.s.2 - This is not some "Dirty hack" with timing tables from some totally other card, but timing table from same card's bios, for that specific memory (BFR).
b.r.
Brka
Great but..
"Invalid Checksum"
-- fixed.
In fact, wrong checksum on memory timings doesnt matter,
So i force flash it with atiflash from command prompt.
P.s. i also have some msi 280x, didnt check which memory is inside,
But bios is larger than on older 280x/7970 (they put new serial flash ic in, its double the size),
Modding gave me some solid results, should be good for your card, too. (Sustained 80+ sols/s).
@others, dont flash this bios randomly. It's gonna brick your cards. It's only for mentioned msi card.
Have anice day.
B.r.
Brka