Can you tell me please how you managed to raise the core so high??

Whith this bios (same as yours) and same drivers, the core after the 830 returns to default!!

(Try 3 differend cards)

I tried to flash 2400 pro Low Profile bios, the core fly to 1180, but the performance was terrible!!

And why you didnt do the memory mod??

If you dont know it tell me.

I would like to give it to you!!

I did a pencil mod for the vMEM - 2.33V is no default You have to use a special version of AMD GPU Clock Tool to raise the core voltage above 850MHz - mine's 0.7.x.