well the cat is out of the bag!
VR-Zone wrote:Official press slides pertaining to the Radeon HD 6800 series has been leaked on Chiphell. The slides reveal the specifications and features of the Radeon HD 6850/6870. The Radeon HD 6800 cards are based on Barts, with 1.7 billion transistors an a die size of 255 mm2. It features a tweaked architecture with a reconfigured core (details are not given), improved tessellation and IQ features. The refined architecture provides over 35% better performance/mm2. The HD 6870, based on Barts XT, features all 14 SIMD engines enabled with 1120 SP and 56 TMU, 32 ROP, clocked at 900 MHz. 4.2 GHz 1GB GDDR5 over 256-bit leads to a memory bandwidth of 134 GB/s. Dual-6 pin PCI-e connectors power the card, with a TDP of 151W. The idle power is an impressive 19W. The HD 6870 is aimed at the GTX 460 1 GB, which it comfortably outperforms by an average of 20%-30% according to AMD's internal testing.
The Radeon HD 6850 is Barts PRO. It features 12 SIMD engines - 960 SP and 48 TMU. It retains the full 32 ROPs and 256-bit memory, but is clocked at 775 MHz. Featuring a single PCIe power connector, the TDP is a reasonable 127W, and idle power is 19W. The HD 6850 is targeted at the GTX 460 768 MB and handily wipes the floor with it with an average improvement of over 30%. Of course, these are AMD's internal testing, and the real world numbers could be different, especially in lower resolutions/IQ where the GTX 460's 768 MB buffer is not a bottleneck. Still, these are huge deltas.
Looking forward, three more HD 6000 series cards will release in Q4 2010 - HD 6950, HD 6970 and HD 6990. The HD 6950 and HD 6970 will be the fastest single-GPU cards, and performance is expected to be between the GTX 480 and HD 5970. The HD 6990 will be the flagship card, playing in its own segment, much like the HD 5970 has been. The ATI HD 5700 series will continue to co-exist till more HD 6000 series derivatives (Turks & Caicos) are released in early 2011.
The prices for the HD 6850 is expected to be ~$180, with the HD 6870 at ~$250. The October 22nd launch is expected to be a hard launch, though there is likely to be limited availability if the demand is high, which is very likely, as the HD 6800 series brings a new level of price/performance.
these flagship cards are projected to be released in Q4 this year, with lower end <5700 replacement cards coming in early 2011
so we're looking at less stream processors for quite a bit more power!Source (VR-Zone)
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