Can my motherboard handle these cards

[theEmiry]

I have an ASUS p8z77-m, and am currently using an amd radeon HD 7950.

I was wondering if I could crossfire the GPU with an r9 280 on that mobo.

Or could you recommend maybe another mobo that could do it.

 

[RazerZ]

Yes you can. Although since you have two PCI x16 lanes which run at x16x4 you will face a minor bottleneck of 5-10% performance loss.

Make sure your PSU can handle the upgrade.

 

[matt1-0-1]

You will be able to crossfire those two cards, but one will be running at pci-e x4, which will bottleneck it, and reduce its performance. You could get any motherboard from this list: http://uk.pcpartpicker.com/parts/motherboard/#xcx=0&s=14&l=2,or just buy a single, higher performance GPU, like a GTX 970 or 980, where you won't get issues with driver scaling, heat, and power usage.

 

[RazerZ]

It's not worth buying a new motherboard for crossfire if the OP chooses to go that route because the bottleneck would result in a marginal performance loss. It would be better to add another 7950 and CF or buy a new more powerful card like you suggested.