baconbits

I know there are other threads about this, but I want to know how my own computer will hold up. Model : Dell Studio XPS 8100 Processor : Intel Core i5 CPU 650 @ 3.20GHz Memory : 8Gb Graphics : NVIDIA GeForce GT 220 1Gb Hard Drive : 920Gb Also, when checking with http://www.systemrequirementslab.com/cyri/, do I check it with ArmA II OR ArmA II: Operation Arrowhead. With ArmA II it says I can run it great, but for ArmA II: OA it says that I just pass minimum requirements. Thanks in Advance