Um no I HIGHLY disagree with this statement and must refute it at once. An X600 can't even run BF2 at decent settings at decent resolution. In NO way or form can a x550 run BF2 at Maxed settings without getting an FPS of around 10-15 with massive video hitches. BF2 even today still demands a decent system ( takes at least a x1950 or high end 7 series card to run it at max settings with 60+ fps ). My x800 xl can BARELY run BF2 at medium settings at 1024x800 resolution and gets around 20-30 fps.
my friend have you used a a card in the X300 series, i know for FACT i can run BF2 online with high settings and not get any lag, learn from experience not what you read or you are told