Radeon HD 3000 Series
| Release date | 2007 |
|---|---|
| Codename | Radeon R600 series |
| Architecture | Radeon R600 |
| Fabrication process and transistors | 181M 55nm (RV620)
|
| Cards | |
| Entry-level | 3430, 3450, 3470 |
| Mid-range | 3650 |
| High-end | 3830, 3850, 3870 |
| Enthusiast | 3850X2, 3870X2 |
| API support | |
| Direct3D |
Direct3D 10.1 Shader Model 4.1 |
| OpenCL | ATI Stream only |
| OpenGL | OpenGL 3.3 |
| History | |
| Predecessor | Radeon HD 2000 series |
| Successor | Radeon HD 4000 series |
The graphics processing unit (GPU) codenamed the Radeon R600 is the foundation of the Radeon HD 2000/3000 series and the FireGL 2007 series video cards developed by ATI Technologies.
This article is about all products under the brand "Radeon HD 3000 Series". All products of this series contain a GPU which implements TeraScale 1.
The Unified Video Decoder (UVD) SIP core is present on the dies of the GPUs used in the HD 2400 and the HD 2600 but not of the HD 2900. The HD 2900 introduced the ability to decode video within the 3D engine. This approach also exonerates the CPU from doing these computations, but consumes considerably more electric current.
The Radeon HD 3800 series was based on the codenamed RV670 GPU, packed 666 million transistors on a 55 nm fabrication process and had a die size at 192 mm2, with the same 64 shader clusters as the R600 core, but the memory bus width was reduced to 256 bits.
The RV670 GPU is also the base of the FireStream 9170 stream processor, which uses the GPU to perform general purpose floating-point calculations which were done in the CPU previously.
The Radeon HD 3850 and 3870 became available mid-November 2007.
The Radeon HD 3690, which was limited only to the Chinese market where it was named HD 3830, has the same core as the Radeon 3800 series but with only a 128-bit memory controller and 256 MiB of GDDR3 memory. All other hardware specifications are retained.
A further announcement was made that there would be a Radeon HD 3830 variant bearing the same features as Radeon HD 3690, but with a unique device ID that does not allow add-in card partners in China to re-enable the burnt-out portion of the GPU core for more memory bandwidth.
The Radeon HD 3690 was released early February 2008 for the Chinese market only.
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Wikipedia