Link
ATI Radeon HD4870
These graphics cards are cool.They are the next gen cards.Reports say that Nvidia plans to release its own line of Teraflop cards.
More significantly, the 4850 and the faster 4870, (both fuelled by the RV 770 processor) broke a virtual performance ceiling and booted graphical processors into the teraflop era.
The 4850 hit one teraflop with a core clock speed of 625 MHz. It consumed just 110 watts of power. The 4870 was rated to deliver 1.2 TFlops clocking 750 MHz and used 160 watts.
Interestingly both offerings came aggressively priced — at approximately Rs 12,000 and Rs 16,000, which was almost half of what competing cards in this category used to cost...till some of them revised their prices to compete.
AMD may not remain alone for long; indeed nVidia simultaneously launched its own new range of cards, the GTX 200 series consisting of the GeForce GTX 260 and GTX 280 cards. The GTX280 has 240 processors, while the GTX260 comes with 192 of nVidia’s G 200 processors.
A comparison of specification shows that the new nVidia cards might work to faster processor clocks ( 1.24 GHz for the 260) than the AMD/Radeon offerings. However they are known to be using DDR 3 (Double Data Rate) RAM while Radeon claims to be the first graphical cards with the new DDR5 memory which is supposed to triple the memory bandwidth.

ATI Radeon HD4870
These graphics cards are cool.They are the next gen cards.Reports say that Nvidia plans to release its own line of Teraflop cards.