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Radeon HD 4890 1GB vs Radeon HD 6970
Intro
The Radeon HD 4890 1GB comes with a clock speed of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.Compare those specifications to the Radeon HD 6970, which has a GPU core clock speed of 880 MHz, and 2048 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 96 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4890 1GB |
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190 Watts |
| Radeon HD 6970 |
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250 Watts |
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Memory Bandwidth
The Radeon HD 6970 should in theory be much faster than the Radeon HD 4890 1GB in general. (explain)
| Radeon HD 6970 |
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176000 MB/sec |
| Radeon HD 4890 1GB |
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124800 MB/sec |
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Texel Rate
The Radeon HD 6970 is much (about 111%) faster with regards to anisotropic filtering than the Radeon HD 4890 1GB. (explain)| Radeon HD 6970 |
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84480 Mtexels/sec |
| Radeon HD 4890 1GB |
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40000 Mtexels/sec |
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Pixel Rate
If running with lots of anti-aliasing is important to you, then the Radeon HD 6970 is superior to the Radeon HD 4890 1GB, by far. (explain)| Radeon HD 6970 |
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28160 Mpixels/sec |
| Radeon HD 4890 1GB |
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16000 Mpixels/sec |
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Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.
Price Comparison
Radeon HD 4890 1GBAmazon.com
Check prices at:
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Radeon HD 6970Amazon.com
Check prices at:
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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
Specifications
| Model | Radeon HD 4890 1GB | Radeon HD 6970 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Apr 2, 2009 | December 2010 |
| Code Name | RV790 XT | Cayman XT |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 1000 MHz | 880 MHz |
| Memory Speed | 3900 MHz | 5500 MHz |
| Power (Max TDP) | 190 watts | 250 watts |
| Bandwidth | 124800 MB/sec | 176000 MB/sec |
| Texel Rate | 40000 Mtexels/sec | 84480 Mtexels/sec |
| Pixel Rate | 16000 Mpixels/sec | 28160 Mpixels/sec |
| Unified Shaders | 800(160x5) | 1536 |
| Texture Mapping Units | 40 | 96 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 959 million | 2640 million |
| Bus | PCIe 2.0 x16 | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 4890 1GBAmazon.com
Check prices at:
|
Radeon HD 6970Amazon.com
Check prices at:
|
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
|
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