Of course you can match. However, the performance of the HD7770 graphics card is equivalent to GTX750, slightly worse, which is a relatively strong entry-level graphics card. So the CPU can not be too bad, H81 supports four generations of Intel processors. However, the H81 chipset is a low-end motherboard, and it is best to go to the Core I3 series, such as the I3 4130 or I3 4160. With 7770 graphics card is more suitable, play some requirements are not too high online games are no problem.
Yes, interface support ah, how to say is also a new frame of the motherboard, do not worry about this ah. Just worry about how it fits into your overall configuration.