need help fixing a fake gt730

[KILLER dz]

well i have been using the macy gt730 2GB ddr3 gpu but started to notice it crashing after passing 1GB of vram and when i removed the cooler the chip was actually a gt520M chip and it has the

EDJ2116DEBG-DJ-F vram chip x4​

and it uses the GF119 BOARD- 13100000(wich is aGT 610) board

i tries flashing bioses from the GTS 450 / GT 610/ GT520 but none worked for me