Help figuring out what graphics card can be used?

[ray1715]

Hello,

Im doing my first pc build and im buying the MSI Gaming Intel Z97 LGA 1150 DDR3 USB 3.1 ATX Motherboard (Z97 Gaming 5) and it says Multi-GPU: NVIDIA SLI & AMD CrossFire Support

So my question is does size or anything matter or as long as its one of those two

 

[ShadowTechXTS]

It doesn't matter, just don't get more than two.