What version of PCI Express do these GPU's and the motherboard use? 2.0 or 3.0? It's just a case of first making sure you haven't made a mistake with not matching up all the numbers with your hardware so we're 100% sure.
Manual from mainboard says : All PCI Express slots conform to PCI Express 2.0 standardMy GPU is Sapphire R9 280x Vapor-X, havent found manual, I just found that it require PCI-E 16x 3.0 standard(i guess for gaming performance)
However in one of mine PCI-E 1x and 16x this gpu is working, it would be nice to find someone who have the same motherboard
