Originally posted by: AnAndAustin

Well neither are ideal. You really want 64MB but at the same time the GTS is 40% faster than the MX400. Since the CPU will be a big limiting factor for most games which benefit from 64MB you might as well get the GTS. IUf you can look for a 64MB GTS, TI, Pro or Ultra OR better still consider a Radeon7500, 9000 or GF4MX which are all faster and should now come with 64MB as std, plus they are all hugely better when it comes to image quality, dual display, DVD playback and TVout too. It's a bit of give & take with the cards you mention but the GTS is marginally better for you providing the prices are the same.