Can I run ArmA II / Dayz with this computer

[baconbits 0]

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