So i have an Asus m2n68-am se2 MB on my pc and i would like to upgrade my Graphics card to an Asus Radeon R7 240 2GB DDR3 128-bit thats running PCIe 3.0 x16 , as iread my MB supports PCIe 1.0 x16, so will the GC be compatible with my MB ? :/ and what kind of bottlenecking would i be looking at ...