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GeForce GTX 460 vs Radeon HD 4790
Intro
The GeForce GTX 460 has a clock speed of 675 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 192-bit memory bus, and uses a 40 nm design. It is made up of 336 SPUs, 56 Texture Address Units, and 24 ROPs.Compare those specifications to the Radeon HD 4790, which comes with core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
Theoretically, the Radeon HD 4790 should perform a little bit faster than the GeForce GTX 460 in general. (explain)
| Radeon HD 4790 |
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102400 MB/sec |
| GeForce GTX 460 |
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86400 MB/sec |
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Texel Rate
The GeForce GTX 460 should be a lot (more or less 97%) more effective at texture filtering than the Radeon HD 4790. (explain)| GeForce GTX 460 |
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37800 Mtexels/sec |
| Radeon HD 4790 |
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19200 Mtexels/sec |
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Pixel Rate
The GeForce GTX 460 should be a lot (approximately 69%) better at full screen anti-aliasing than the Radeon HD 4790, and also should be capable of handling higher resolutions without losing too much performance. (explain)| GeForce GTX 460 |
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16200 Mpixels/sec |
| Radeon HD 4790 |
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9600 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 460Amazon.com
Check prices at:
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Radeon HD 4790Amazon.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 | Radeon HD 4790 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | July 2010 | 2009 |
| Code Name | GF104 | RV790 |
| Memory | 768 MB | 512 MB |
| Core Speed | 675 MHz | 600 MHz |
| Memory Speed | 3600 MHz | 3200 MHz |
| Power (Max TDP) | 150 watts | (Unknown) watts |
| Bandwidth | 86400 MB/sec | 102400 MB/sec |
| Texel Rate | 37800 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 16200 Mpixels/sec | 9600 Mpixels/sec |
| Unified Shaders | 336 | 640(128x5) |
| Texture Mapping Units | 56 | 32 |
| Render Output Units | 24 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-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 data (in units of megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 that the graphics 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 ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.
GeForce GTX 460Amazon.com
Check prices at:
|
Radeon HD 4790Amazon.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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