I want to upgrade my processor and graphics card so i can run Call of Duty 4 in higher spec than i currently have.

Atm i have the following processor and GFX card:
Processor: AMD Athlon 64 X2 Dual Core Processor 3600+, 2.01 GHz
Graphics Card: Radeon X1550 (512mb) AGP

I have had a look around and found some upgrades, but im not sure if they are compatible with my mobo (which is an ASRock am2nf3-vsta)

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discriptions from vendor site.

AMD X2 Dual Core AM2 Athlon 64 6000 3.0GHz 2x1MB Socket AM2 90nm
AMD X2 Dual Core AM2 Athlon 64 5200 2.7GHz 2x512K Socket AM2 65nm
AMD X2 Dual Core AM2 Athlon 64 5200 2.6Ghz 2x1MB Socket AM2 90nm

Novatech GeForce 7900GS 512MB DDR3 DUAL DVI, TV Out, AGP OEM
Novatech X1950 Pro 512MB GDDR3 AGP TV Out Dual DVI

Can some please tell me if the following processors & GFX cards are compatible.
If u need any other info, then please let me know.

Thnx

Razor