Will PCIE2.0 work on a PCIE3.0?

Jepoy005

Honorable
Oct 8, 2012
5
0
10,510
Hey guys im building an IVY BRIDGE CPU w/ Z77 motherboard. Now, the Z77 motherboard comes with 3 PCIE 3.0 sockets.

My question is will the older version (PCIE2.0 x16) work on the new PCIE3.0 x 16?

THank you so much for your answer!