Final Radeon HD 4000-series details emerge
The Radeon HD 4850 will apparently feature 480 stream processors, a 625MHz core speed, an 825MHz shader speed, 512MB of 1143MHz GDDR3 memory, and a 114W thermal envelope. The faster Radeon HD 4870 will also have 480 SPs, but with an 850MHz core speed, 1050MHz shader speed, 1GB of 1935MHz (3870MHz “effective”) GDDR5 RAM, and a 157W TDP. Both cards will also feature 256-bit memory buses and 16 raster operators, just like existing Radeon HD 3800-series models, but with twice as many texture mapping units (32 instead of 16).
Hardware-Infos says the Radeon HD 4850 will launch at $249 and the Radeon HD 4870 will be $349. If recently leaked performance numbers are accurate, the 4850 may be in the same playing field as Nvidia’s ~$300 GeForce 9800 GTX.