AMD Radeon HD 5670 Review - DX11 breaches the $100 mark
DX11 continues to shrink
AMD Still Dominates DX11
It has nearly been five months since AMD first introduced its DX11-capable graphics cards starting with the AMD Radeon HD 5870 powerhouse that has been followed by the HD 5850, HD 5770 and HD 5750. And even though there are very few titles available today (or even set for a Q1 launch) that will take advantage of DX11, you can be sure that NVIDIA and its investors are paying attention to how far behind the other GPU giant is falling. With Fermi and GF100 (the consumer card design based on Fermi) set for a March release time frame, that would in theory give AMD a solid 6-7 month lead. What they are able to do with that lead depends greatly on selling as many GPUs as possible between now and then to cement ATI's position as the leading GPU technology for the coming years.
We have taken detailed looks at the Radeon 5000-series GPU in previous articles and explained how the architecture scales both UP and DOWN with cost and performance and size - a move that AMD has benefited from tremendously. The new Radeon HD 5670 graphics card that we are reviewing today is a new silicon spin that shrinks die size quite a bit thus lowering costs to AMD and its partners in order to offer the first sub-$100 graphics card ever.
The RV830 GPU
As I mentioned above, the GPU on the Radeon HD 5670, known by its codename as RV830, is not just the GPU with some sections disable, but is instead a completely new 40nm GPU using fewer transistors and thus will be cheaper to build. You can see the block diagram below:
As we go over in detail in our HD 5870 review, there are some new
features that make the HD 5000-series of GPUs stand out from the
- Support for DirectX 11 and Shader Model 5.0
- Support for OpenCL 1.0 (and likely OpenCL 1.1)
- Angle independent anisotropic filtering (finally!)
- "Nearly free" 4xMSAA
- Very low idle power consumption
- AMD Eyefinity multi-monitor gaming - first performance testing here
- Three monitor support on a single card
Radeon HD 5500 Series
Radeon HD 5400 Series
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