-BonzO- :
No you won't. Especially if you're gonna use AA as well as bilinear filtering.
My suggestion for full speed in FFX is a Core2Duo running at 2.4Ghz (E6600) or an AMD X2 5200 or above. And the video card will slow down especially if you use AA and BF. However if you don't plan on using those features, then it's more than enough. Until Shiva.......
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Current PC specs :
AsRock 945GCM-S
Pentium Dual Core E5200 @ 2912Mhz (233x12.5)
Palit Radeon 4850 Sonic 512MB gDDR3
2x2048MB Kingston DDR2 800Mhz RAM