I bought a M5A97 LE R2.0 motherboard forgetting to check the pciexpress version. My graphics card is R7240-2GD3-L asus radeon card. Plugged it in, doesn't work. It works in the old mb, but i don't have sata 6gb/s on that one. Is there some way to force my mb to accept the graphics card? is there something i'm missing?