I’ve often wondered if the Radeon HD 6950 cannibalized Radeon HD 6970 sales because they were so similar (surely it didn’t help that 6950s were getting updated via firmware to look even more like 6970s) That could be what AMD is trying to avoid this time around.Īlthough it’s tempting to look at raw specifications and draw comparisons, you really can’t, on account of the dissimilar architectures. AMD seems to have decided that it needed to spread its mid-range cards further apart from each other. In contrast, the Radeon HD 7850 comes armed with a roughly 25% deficit compared to Radeon HD 7870. Interestingly, the Radeon HD 6950 only proffers about 10% fewer shaders than the Radeon HD 6970. We’ve seen it completely tank in DirectX 9-class applications, and then deliver stellar performance in more modern titles.Īll of the cards in the above chart feature 256-bit memory interfaces feeding 32 ROPs, but the 6900 series’ higher memory clock rates facilitate a little more bandwidth. VLIW4 was the product of much evolution, and hence quite mature. Remember also that both line-ups also employ different architectures optimized for different things. In general, AMD’s Radeon HD 6900 family features more shaders and texture units, while the 7800s operate at higher clock rates. AMD doesn’t make any changes to this part of the chip both the Radeon HD 78 sports identical back-ends. Four 64-bit memory controllers yield an aggregate 256-bit memory bus. The GPU’s back-end is made up of eight render partitions, each with four full-color ROPs, totaling 32 ROPs. AMD shears off four compute units from Pitcairn to create the Radeon HD 7850, resulting in 1024 shaders 64 texture units. In an uncut GPU, those numbers multiply out to 1280 total shaders and 80 texture units. Pitcairn hosts 20 compute units, each with four vector units made up of 16 stream processors and a single texture unit. That’s nearly twice as large as the GPU at the heart of Radeon HD 7770, but around two-thirds of Tahiti, which drives the Radeon HD 7970. The graphics processor is composed of 2.8 billion transistors in a 212 mm 2 die manufactured on TSMC’s 28 nm lithography node. Code-named Pitcairn, we finally have a solution in between the flagship Tahiti and the entry-level Cape Verde. This is the third distinct Graphics Core Next-based ASIC from AMD in as many months. : Radeon HD 7800s: Great Performance, Price, And Power.: Benchmark Results: MediaEspresso, Luxmark 2.0, Bitmining.: Benchmark Results: World Of Warcraft.: Benchmark Results: The Elder Scrolls V: Skyrim.: Benchmark Results: Batman: Arkham Asylum.: Benchmark Results: 3DMark 11 And Unigine Heaven.: Texture Optimizations And The Radeon HD 7000s.
: Features, MLAA 2.0, And SSAA Updates.: Radeon HD 78: A Paper Launch by Any Other Name.Radeon HD 78: A Paper Launch by Any Other Name