This is a little ironic, but, when I used to have a pirated copy of Crysis 2 + Patch 1.9 + DX11 Pack + Hi-Res Texture Pack, the game ran perfectly. Now that I bought Crysis 2 Maximum Edition and ran it at the exact same settings, I am getting a ridiculous framerate. The game is barely playable! What gives?

These are my specs:
* AMD Phenom II X6 1090T @ 3.2GHz
* OCZ PC3-10700H DDR3 16GB @ 800MHz
* NVIDIA GeForce GTX 480 1.5GB

I would appreciate any insights into this.