It should be, but there might be a slight limiting factor from the fact it has a pcie 2x and the card is pcie3x. They are compatible. What about your PSU though?
i have saw a review that girl have the same card and saying "Yes. I just recently have the RMA for this card. Got no display so distro replaced with the new one."
what this mean?
She had to return it to manufacturer. Don't worry about it unless tons of people are returning the card and its general an actual issue with the card (instead of it being a lemon).
The rig you posted is not perfect . Crossfire and SLI have bugs . Moreover the second PCI-E x16 slot of M5A97 R2.0 is running at x4 . Hence NVidia doesnt allow SLI . Crossfire x8/x4 is not good idea . Chipsets AMD 990 are faster . Furtermore Intel Core i5 is better for gaming and even for everything like i5 4690 . The monitor is HD resolution . R9 270X Crossfire would draw a lot of power - 360W !
Good motherboards for FX 8350 with SLI/Crossfire : http://ca.pcpartpicker.com/part/asus-motherboard-m5a99xevor20
http://ca.pcpartpicker.com/part/asus-motherboard-m5a99fxpror20