R9 280x change to 7950 ????

[failcl]

My Graphic Card is R9 280x (Flashed) have Boot Screen, i update my OS to 10.14... The Graphic Card change to ATI 7950 ???? what happen ???

 

[h9826790]

Normal. That card’s name was assigned during flashing. You can call it 2080Ti if you want to.

If no modification during flashing, then the Mac EFI is from the 7950 Mac Edition card, that’s why it ident itself as 7950.

 

[failcl]

But the speed is down !!!!
Why ????
OSX 10.13.2 is R9 280x !!!!
OSX 10.14.1 is 7950 !!!!