[RaZZoR]

Well , i think that ATi Radeon 4730 512mb is better than 9800GT. ( More shader cores , gddr5 memory , etc [9800gt has less shader cores , its gddr3 and maybe its core clock is less than 4730s ] ) Plus 4730 is cheaper
And you meant ATI or Nvidia/GeForce or Radeon ?
btw 512mb video memory isnt enough for the best games today..like gta 4...