Pci express 3.0 vs 2.1 etc compatibility help

[c a t]

http://postimage.org/image/4fh8t7ip3/ this is the screenshot of CPU-Z please tell me if my motherboard will support

1. HD 7750 Gddr5 (pci express 3.0)
2. HD 6670 (pci express 2.1)

 

[rolli59]

Might have issues with ver2.1 card but none known with the ver 3.0cards.

 

[maestro0428]

They are all cross compatible. I would go with the 7750 out of those two cards.