Msi gtx 670 under performing

Hello.

I believe my gtx 670 is under performing. When running games like bf3, arma 2, blacklight: retribution, and alot of non graphic intensive games i will get a stuttering/freeze when playing at even the lowest settings.

My specs are:

Intel Core i5-3570K 3.4GHz Quad-Core Processor
Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
ASRock Z77 Extreme4 ATX LGA1155 Motherboard
Patriot Gamer 2 Series 8GB (2 x 4GB) DDR3-1600 Memory
Samsung Spinpoint F3 1TB 3.5" 7200RPM Internal Hard Drive
OCZ Vertex 4 128GB 2.5" Solid State Disk
MSI GeForce GTX 670 2GB Video Card
Corsair 500R White ATX Mid Tower Case
Corsair Professional 750W Power Supply

I also did a heaven 3.0 benchmark
http://imgur.com/mEcZ0

Getting very frustrated, and trying to look for a solution. I have updated all my nvidia drivers. Next plan of action if i can't find a solution is getting a replacement. Thanks for helping me!