More Details Emerge on AMD's HD 6800 Series
By hanging out at the rumor mill, we recently learned AMD plans to ship its next-generation HD 6870 and HD 6850 graphics cards on October 22nd, just over a week from today. Before we left, we heard some more interesting chatter.
Keep in mind that none of this is coming from AMD, but it appears the company who killed off the ATI brand is playing shenanigans with the upcoming cards' model numbers. At a glance, you would expect the 6870 and 6850 to replace the 5870 and 5850, but you'd be wrong, through no fault of your own. Placing logic in a burlap sack, beating it senseless, and throwing it into a river, AMD's 6870 and 6850 will reportedly replace the Radeon 5700 series.
Chinese-language website XFastest.com has the skinny on the new parts. According to XFastest, the 6870 has a 900MHz core clock, 960 stream processors, a 256-bit memory bus, and GDDR5 cranked up to 4200MHz (effective). This one will likely end up selling for $250.
As for the 6850, this one features a 775MHz core clock, 800 stream processors, and GDDR5 clocked at 4000MHz (effective), as well as the same 256-bit memory bus.
XFastest has the 6870 scoring below a 5870 in 3DMark Vantage (P17,924 versus P16,270), while the 6850 scored below a 5850 (P15,593 versus P14,872).

Image Credit: XFastest.com