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GeForce GTX 460 1GB vs Radeon HD 4890 1GB
Intro
The GeForce GTX 460 1GB features a clock frequency of 675 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is made up of 336 SPUs, 56 TAUs, and 32 Raster Operation Units.Compare that to the Radeon HD 4890 1GB, which has GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 975 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GTX 460 1GB |
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160 Watts |
| Radeon HD 4890 1GB |
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190 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 4890 1GB will be 8% faster than the GeForce GTX 460 1GB in general, due to its greater bandwidth. (explain)
| Radeon HD 4890 1GB |
|
124800 MB/sec |
| GeForce GTX 460 1GB |
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115200 MB/sec |
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Texel Rate
The Radeon HD 4890 1GB is a small bit (more or less 6%) faster with regards to texture filtering than the GeForce GTX 460 1GB. (explain)| Radeon HD 4890 1GB |
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40000 Mtexels/sec |
| GeForce GTX 460 1GB |
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37800 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the GeForce GTX 460 1GB is the winner, by far. (explain)| GeForce GTX 460 1GB |
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21600 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
GeForce GTX 460 1GBAmazon.com
Check prices at:
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Radeon HD 4890 1GBAmazon.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 | GeForce GTX 460 1GB | Radeon HD 4890 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | July 2010 | Apr 2, 2009 |
| Code Name | GF104 | RV790 XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 675 MHz | 1000 MHz |
| Memory Speed | 3600 MHz | 3900 MHz |
| Power (Max TDP) | 160 watts | 190 watts |
| Bandwidth | 115200 MB/sec | 124800 MB/sec |
| Texel Rate | 37800 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 21600 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 336 | 800(160x5) |
| Texture Mapping Units | 56 | 40 |
| Render Output Units | 32 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 40 nm | 55 nm |
| Transistors | 1950 million | 959 million |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 11 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. 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 lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
GeForce GTX 460 1GBAmazon.com
Check prices at:
|
Radeon HD 4890 1GBAmazon.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.
|
Comments
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