New video card for old motherboard

[sovasovasova]

Hello,
I'm planning to buy a new AMD radeon RX470/480/570/580, which is using pci-e 3.0
However, my old motherboard supports only pci-e 2.0(asus fm2-a85m) with the AMD a10-5800k. So I wonder if any of these video cards would run on my PC or not.
Also, should I really consider picking rx480/rx580 or the processor would be to weak for it?
Thanks in advance

 

[alth0triplemadang]

Yes, your CPU is too weak when paired with current-gen gaming grade graphics card.
I recommend you to get R7 270x, it will work perfectly with your APU without bottlenecking.

For PCIe, there is no significant performance drop if you install a PCIe 3.0 GPU into 2.0 motherboards, it will work just fine.

 

[sovasovasova]

Yes, your CPU is too weak when paired with current-gen gaming grade graphics card.
I recommend you to get R7 270x, it will work perfectly with your APU without bottlenecking.

For PCIe, there is no significant performance drop if you install a PCIe 3.0 GPU into 2.0 motherboards, it will work just fine.

even the rx460 would be bottlenecking? It's pretty hard to find the model you've advised. Would R7 360 be fine, for example? Or new Radeon RX 550?

 

[alth0triplemadang]

For RX 460, I think not so much...

 

[RobCrezz]

gtx 1050 or rx460 should work pretty well.

 

[sovasovasova]

For RX 460, I think not so much...

and should I go for 4 gb, or 2 gb would be enough?

 

[alth0triplemadang]

4GB gives you more FPS if you game on higher resolution compared to 2GB since higher the resolution, the more VRAM it consumes.

If there is slight difference between 4GB card and 2GB card, I'd go with 4GB card.