Basically my MSI MS-7681 have 5 PCIE slots (2x16 and 3x1), so it could be nice, but it doesn't work with R9 and I don't know what would work. I know I will not get maybe the best mobo for mining, but if someone could for example give me a list of mobos that are 100% sure to work well with R9 290 I'd be really grateful