Crossfiring differnt model cards

[PandaHugs]

im wanting to crossfire an asus r9 290 and a his digital 7770 hd pro. is it possible to make happen or will it not work? (getting a new card for my build and wondering if i would still be able to use my old card)

[Sammy]

They have to be the same class but even if it did I am pretty sure the better card would be limited to the same specs as the old one. At least that is what I read about AMD.

[Cylon]

Don't crossfire different cards, They literally have to be the exact same models to get any benefit, it's just like having ram with different speeds, 1600, 1866, 2100, 2300 If you have 1 with 2300 and you have another with 1600, the ram is going to set to the lowest spec, which is 1600.  If you crossfire those cards you're going to be bottle necking your graphics cards, so it's either going to be the same or even worse.  Like having a 5.0Ghz processor and 1 Gb of ram, you're not going to see any benefit from CPU with that kind of bottle neck.