Your motherboard should never affect your fps? Sometimes it might be the ram but we're talking about 5 frames difference. It's your GPU, the 560 is so old is about the same as some crappy cheap desktop GPU by today's standards. If you wait a bit longer the new line of 900s from nVidia are coming out, just grab a new card from that line and you'll be fine.
delpo's right, your motherboard can't actually overclock your K CPU, but that i7 is still good enough for most things so really no need to upgrade your CPU or MB.