Use gpuz or similar program to know what brand memory the gpus have , then use


Strap 1 - hynix
Strap 2 - Samsung
Strap 3 - Micron / Elpida

Depending on lottery
Strap 4 - Hynix
Strap 5 - Samsung / Micron / Elpida
Strap 6 - worked with micron and elpida