rx 570 4g+8g cf?

[martindingchina]

I have a rx 570 8g, can it cf with a rx 570 4g?

 

[sizzling]

Yes but you will effectively only have 4gb VRAM avalible. I’d also advise against crossfire as modern game support is very poor, either it’s not supported or the scaling is usually not a big improvement over 1 card.