I purchased a asus am1ma mb for my brother. I have a r7 370 left from my old build to put in. I didnt realize this board had a pci express 2.0x4. I know this will cripple the card but by how much?
I googled the motherboard, it has a 16x slot and ignored the 4x but in read the spec the 16x slot is in 4x mode. So my previous comment was wrong. The difference is not 7% or less it would be closer to 13% slower on average.
In theory a 3.0 PCI express would be twice as fast but most benchmarks show a modest gain. (7% or less)
http://www.hardwaresecrets.com/pci-express-3-0-vs-2-0-gaming-performance-gain/
I googled the motherboard, it has a 16x slot and ignored the 4x but in read the spec the 16x slot is in 4x mode. So my previous comment was wrong. The difference is not 7% or less it would be closer to 13% slower on average.