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The TDP is only 50w. You should be fine.

Calculate your power requirements here. It's surprisingly accurate.

EDIT: Yes, the 5200 FX will meet all requirements of MW1 and you will be able to run it substantially better with than without, but I still recommend the 9500/9400GT. If you do a flat comparison of specs, the 9500GT is 4x stronger than a 5200FX. You get a far greater bang for your buck with the better card. I can understand if you're scrapped for cash, though.

Alright, I'll see what I can get. If I can, I'll do my best to go with the higher end cards, but if not I'll try and fall back on the PNY card.