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Radeon HD 4870 1GB vs Radeon R9 290X
Intro
The Radeon HD 4870 1GB comes with a clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.Compare those specs to the Radeon R9 290X, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 512-bit memory bus, and makes use of a 28 nm design. It is made up of 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4870 1GB |
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150 Watts |
| Radeon R9 290X |
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300 Watts |
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Memory Bandwidth
Performance-wise, the Radeon R9 290X should in theory be much better than the Radeon HD 4870 1GB in general. (explain)
| Radeon R9 290X |
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320000 MB/sec |
| Radeon HD 4870 1GB |
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115200 MB/sec |
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Texel Rate
The Radeon R9 290X should be a lot (about 369%) faster with regards to anisotropic filtering than the Radeon HD 4870 1GB. (explain)| Radeon R9 290X |
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140800 Mtexels/sec |
| Radeon HD 4870 1GB |
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30000 Mtexels/sec |
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Pixel Rate
The Radeon R9 290X is a lot (about 327%) faster with regards to FSAA than the Radeon HD 4870 1GB, and will be able to handle higher screen resolutions more effectively. (explain)| Radeon R9 290X |
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51200 Mpixels/sec |
| Radeon HD 4870 1GB |
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12000 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 4870 1GBAmazon.com
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Radeon R9 290XAmazon.com
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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 4870 1GB | Radeon R9 290X |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | October 2013 |
| Code Name | RV770 XT | Hawaii XT |
| Fab Process | 55 nm | 28 nm |
| Bus | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Memory | 1024 MB | 4096 MB |
| Core Speed | 750 MHz | 800 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 900 MHz (3600 MHz effective) | 1250 MHz (5000 MHz effective) |
| Unified Shaders | 800(160x5) | 2816 |
| Texture Mapping Units | 40 | 176 |
| Render Output Units | 16 | 64 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 512-bit |
| DirectX Version | DirectX 10.1 | DirectX 11.2 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.3 |
| Power (Max TDP) | 150 watts | 300 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 115200 MB/sec | 320000 MB/sec |
| Texel Rate | 30000 Mtexels/sec | 140800 Mtexels/sec |
| Pixel Rate | 12000 Mpixels/sec | 51200 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
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