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Radeon HD 4890 2GB vs Radeon R7 250X 2GB
Intro
The Radeon HD 4890 2GB uses a 55 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory runs at a frequency of 975 MHz on this particular model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.Compare all that to the Radeon R7 250X 2GB, which comes with core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon R7 250X 2GB |
|
95 Watts |
| Radeon HD 4890 2GB |
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190 Watts |
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Memory Bandwidth
The Radeon HD 4890 2GB should theoretically be quite a bit faster than the Radeon R7 250X 2GB in general. (explain)
| Radeon HD 4890 2GB |
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124800 MB/sec |
| Radeon R7 250X 2GB |
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72000 MB/sec |
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Texel Rate
Both cards have the exact same texel fill rate, so theoretically they should be equally good at at anisotropic filtering. (explain)Pixel Rate
Both cards have the exact same pixel rate, so in theory they should be equally good at at full screen anti-aliasing, and be able to handle the same resolutions. (explain)
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 2GBAmazon.com
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Radeon R7 250X 2GBAmazon.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 4890 2GB | Radeon R7 250X 2GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Apr 2, 2009 | February 2014 |
| Code Name | RV790 XT | Cape Verde XT |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 1000 MHz | 1000 MHz |
| Memory Speed | 3900 MHz | 4500 MHz |
| Power (Max TDP) | 190 watts | 95 watts |
| Bandwidth | 124800 MB/sec | 72000 MB/sec |
| Texel Rate | 40000 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 16000 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 800(160x5) | 640 |
| Texture Mapping Units | 40 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 28 nm |
| Transistors | 959 million | 1500 million |
| Bus | PCIe 2.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11.2 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.3 |
Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines 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 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 ability to get to the max fill rate.
Radeon HD 4890 2GBAmazon.com
Check prices at:
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Radeon R7 250X 2GBAmazon.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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