Now the Radeon HD 6870 X2 is based on two Barts GPUs. The single GPU cards derived from Barts will in fact be segmented into the mid-range, not high-end as many people expected.
Let's have a quick comparative overview of some of the specifications representing a certain cope of mid-range performance products
Radeon HD 5770
Radeon HD 5850
Radeon HD 6850
Radeon HD 6870
1 GB GDDR5
1 GB GDDR5
1 GB GDDR5
1 GB GDDR5
2 GB GDDR5
~ 127 watts
Faster than 5830
Faster than 5850
Faster than 6970
So the two R6800 SKUs each have a separate codename, the R6850 being Barts Pro and the 6870 being the Barts XT.
Both cards are of course updated DX11 class products with a couple of new features. Armed with 1.7 billion transistors the Radeon HD 6850 is pitted against the competition's GeForce GTX 460 and GTX 560 models, the 6850 is clocked at 775 MHz on its core and shader processor domain and comes with a full GB of graphics memory. This memory is 256-bit and running at an effective data-rate of 4000 MHz.
The product has 12 SIMD clusters, 48 texture units, 960 shader processors, 32 ROPs and a TDP of 127W, 19W in idle. Despite the memory bus you can recognize similarities close to the R5770 here. This product however will bring you 1.5 TFLOPS of performance, and combined with that 256-bit gDDR5 memory it will leave the R5770 far behind it.
Pitted against the GeForce GTX 560 1GB version is the Radeon HD 6870, and this is going to be the more interesting product for most of Guru3D's readers we suspect. As you noticed, the overall shader count and clock frequencies are higher then earlier leaked rumors, that applies to the R6870 as well.
The 6870 is clocked a good chunk faster at a nice 900 MHz, it also comes with a full GB of graphics memory. This memory is 256-bit and running at an effective data-rate of 4200 MHz with a peak bandwidth of 134 GB/sec. The product has 14 SIMD clusters, 56 texture units, 1120 shader processors, 32 ROPs and a TDP slightly above 150W with a 19W idle TDP. This product will bring you 2.0 TFLOPS of performance. This means that performance wise the R6870 will sit in-between a R5850 and 5870.
Features wise both graphics cards will be very similar to the last generation products and are merely an advanced update, however some new features like DisplayPort which now follows 1.2 interface specification, HD3D, UVD3 and HDMI 1.4a are introduced. We also spot a new Anti-Aliasing mode (Morphological AA), better Anisotropic Filtering and improved Tessellation performance up-to twice the performance of that of the 5000 series.
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Club3D Radeon HD 7850 Royal Queen review Club3D jumped the 7800 bandwagon as well with several models, and for this review we'll be looking at their Radeon HD 7850 Royal Queen edition which comes with 1 GB of graphics memory. The product comes default in many ways, except the cooler. Club3D uses a small PCB and pretty slim dual-slot cooler making the card very easy to install. The graphics card is equipped with one 6-pin PCIe power connector. As mentioned the card comes default/reference clocked at 860 MHz and the memory is clocked at a 4800 MHz reference as well.
Club3D Radeon HD 6870 X2 review We review the Club3D Radeon HD 6870 X2. A dual-GPU Barts based graphics card. AMD had nothing to do with this design, this is a custom design product. Admittedly we just love that stuff. So we'll head over into the review, we'll cover a thing or two about BARTS based processors, have a closer look at the Club3D Radeon HD 6870 X2.