Crysis 2 Crashes

Hey guys. I just installed Crysis 2 on my brand new build (see below), with the DX11 patch, high res texture pack, and the 1.9 patch. I'm running a GTX 570 with current drivers (280.26).

Crysis 2 loads fine, but after a few minutes of gameplay it locks up - the screen goes black, the audio continues to play, and I have to Ctr-Alt-Del to get into Task Manager and force it to quit.

I'm desperate to figure out what's going on. Any help would be greatly appreciated.

My build:
INTEL, Core™ i7-2600K Quad-Core 3.4GHz, HD Graphics 3000, LGA1155, 8MB L3 Cache, 32nm, 95W, EM64T EIST HT TB VT-x XD, Retail

COOLER MASTER, Hyper 212 Plus CPU Cooler, Socket 1155/1156/1366/775/AM3/AM2, Copper/Aluminum, Retail

GIGABYTE, GA-Z68XP-UD3, LGA1155, Intel® Z68, DDR3-2133 32GB /4, PCIe x16 SLI CF /2, SATA 3Gb/s RAID 5 /4, 6Gb/s /4, USB 3.0 /4, HDMI, HDA, GbLAN, FW /2, ATX, Retail

KINGSTON, 16GB (4 x 4GB) XMP HyperX X2 Grey PC3-12800 DDR3 1600MHz CL9 1.65V SDRAM DIMM, Non-ECC

EVGA, GeForce® GTX 570 Superclocked (AR) 797MHz, 1280MB GDDR5 3900MHz, PCIe x16 SLI, 2x DVI+mini-HDMI, Retail

SEAGATE, 1TB Barracuda® 7200.12, SATA 6 Gb/s, 7200 RPM, 32MB cache

CRUCIAL, 128GB M4 SSD, MLC Marvell 88SS9174, 415/175 MB/s, 2.5-Inch, SATA 6 Gb/s, Retail

SONY, AD-7260S Black 24x DVD±R/RW Dual-Layer Burner, SATA, OEM

COOLER MASTER, CM 690 II Advanced Black Mid-Tower Case, ATX, No PSU, Steel/Plastic

CORSAIR, TX850 V2 Power Supply 850W, 80 PLUS® Bronze, 24-pin ATX12V v2.31 EPS12V 2.92, 4x 8/6-pin PCIe

MICROSOFT, Windows 7 Home Premium 64-bit Edition w/ SP1, OEM