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It features 4608 shading units, 288 texture mapping units, and 128 ROPs. Unlike the fully unlocked Radeon RX 6950 XT, which uses the same GPU but has all 5120 shaders enabled, AMD has disabled some shading units on the Radeon RX 6800 XT to reach the product's target shader count. The Navi 21 graphics processor is a large chip with a die area of 520 mm² and 26,800 million transistors. Additionally, the DirectX 12 Ultimate capability guarantees support for hardware-raytracing, variable-rate shading and more, in upcoming video games. This ensures that all modern games will run on Radeon RX 6800 XT. Built on the 7 nm process, and based on the Navi 21 graphics processor, in its Navi 21 XT variant, the card supports DirectX 12 Ultimate. At least, that's the current plan, according to company representatives.The Radeon RX 6800 XT is a high-end graphics card by AMD, launched on October 28th, 2020. It remains to be seen whether AMD can get the developer to add a slider for geometry detail.
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That might turn out to be the first example of Nvidia's advantage, even if it was sponsored. From what we hear, Nvidia took Ubisoft to bed, and the result, HAWX 2, employs what amounts to a worst-case geometry scenario for AMD. But we still haven't seen a game capable of coming anywhere close to giving Nvidia an advantage due to its geometric processing potential. AMD counters that geometry is actually better-addressed through its single unit, and that its approach is much more efficient.Īt the end of the day, Nvidia still outperforms AMD in synthetic measures of tessellation. Parallelizing geometry, it claimed, was the key to adding the next level of realism. Instead, Nvidia advocated its Polymorph Engine, present on each of its architecture's Shader Multiprocessors. When Nvidia launched GF100, it went straight for AMD's throat, claiming the single fixed-function tessellation unit would not scale well. This is a particularly sensitive subject for AMD. When tessellation is used, we can see the Radeon HD 6850 reach Radeon HD 5850-class performance, and the Radeon HD 6870 leaves the other Radeons behind. The first chart shows the benchmark results with no tessellation applied, and the second demonstrates results with the normal tessellation level enabled. We can see the result of this in the Unigine Heaven benchmark: According to the company, improved thread management and buffering yields between 1.5 and 2x performance in what it considers the most important (real-world) range, below 14 tessellation factors. Perhaps the highest-profile performance-adder is an enhanced tessellation unit. But AMD's engineers assure us that notable improvements have been made, and features added. On the surface, both Barts-based SKUs appear to be (at least architecturally) derived wholly from Cypress. More threatening to the Radeon HD 6850 will be an onslaught from Nvidia, which we'll also dissect in more depth.
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AMD’s suggested retail price of the Radeon HD 6850 is $180, and while Radeon HD 5830 cards can sometimes be found for that price, the majority of them are in the $200 range. The resulting performance should be notably faster than Radeon HD 5830. The core clock drops to 775 MHz, but all of the render back-ends are fortunately left intact. The only difference here is that two of the GPU’s 14 SIMDs are disabled, resulting in 12 SIMDs with a total 960 stream cores and 48 texture units. The second product based on AMD's RV870 GPU is the Radeon HD 6850. The MSRP of the Radeon HD 6870 is $240, a bit less than the Radeon HD 5850, which still sells online for $260 and up (though rebates take it lower). The Radeon HD 6870's memory runs at 1050 MHz, slightly faster than the 5850's 1000 MHz. At the same time, the 6870’s texture unit and ALU deficit (compared to the 5850) is offset by a higher core clock, resulting in roughly the same overall performance.Īt the end of the day, this means the Radeon HD 6870 performs a little better than the Radeon HD 5850, but does it with about 25% less silicon, purportedly reducing idle power and overall cost-two definite benefits for the end user. This means geometry throughput is almost 25% higher than the 725 MHz Radeon HD 5850 because it’s limited to one primitive and one vertex per clock cycle. Despite the re-use of 40 nm manufacturing, at 900 MHz, the less-complex Barts GPU runs much faster than the 5830, or even the 5850. : Power, Temperature, And Noise Benchmarksīut there’s one more critical component to performance, and that’s clock rate.: HQV 2.0 Video Playback Quality Benchmark.: Benchmark Results: Battlefield: Bad Company 2.: Benchmark Results: Aliens Vs Predator.: Eyefinity, UVD3, And AMD APP Compute.