post #11 of 11
you will definitely see improvement but not as much as other typical crossfire setup of the same cards as the other card is limited in bandwith so it is only running around 80% performance IIRC in accordance to PCIe scaling depending on which generation of PCIe

ideally 16x 16x is the best but 8x 8x only loses out in a few frames which makes it a good economical choice and 16x 4x is not preferred but will work