I have seen in a comparison that HIS ATI Radeon 4850 IceQ 4 Turbo X 512MB easily beats Geforce 9800GTX and sometimes beats Geforce GTX260 and even gives same performance as Geforce GTX260.ASUS ATI Radeon 4850 512MB(9% factory overclocked) has 680mhz GPU and 2100mhz Memory Clock.On the other hand HIS ATI Radeon 4850 IceQ 4 Turbo X 512MB has 685mhz GPU and 2200mhz Memory Clock.So which one is better among these?