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GeForce GTX 460 vs Radeon HD 4790
Intro
The GeForce GTX 460 comes with a clock frequency of 675 MHz and a GDDR5 memory frequency of 900 MHz. It also makes use of a 192-bit bus, and makes use of a 40 nm design. It is made up of 336 SPUs, 56 TAUs, and 24 ROPs.Compare those specs to the Radeon HD 4790, which features clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
In theory, the Radeon HD 4790 should perform a little bit faster than the GeForce GTX 460 overall. (explain)
| Radeon HD 4790 |
|
102400 MB/sec |
| GeForce GTX 460 |
|
86400 MB/sec |
|
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Texel Rate
The GeForce GTX 460 is much (approximately 97%) faster with regards to AF than the Radeon HD 4790. (explain)| GeForce GTX 460 |
|
37800 Mtexels/sec |
| Radeon HD 4790 |
|
19200 Mtexels/sec |
|
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Pixel Rate
The GeForce GTX 460 will be a lot (more or less 69%) faster with regards to full screen anti-aliasing than the Radeon HD 4790, and should be capable of handling higher screen resolutions better. (explain)| GeForce GTX 460 |
|
16200 Mpixels/sec |
| Radeon HD 4790 |
|
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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
GeForce GTX 460Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 4790Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTX 460 | Radeon HD 4790 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | July 2010 | 2009 |
| Code Name | GF104 | RV790 |
| Fab Process | 40 nm | 55 nm |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| Memory | 768 MB | 512 MB |
| Core Speed | 675 MHz | 600 MHz |
| Shader Speed | 1350 MHz | (N/A) MHz |
| Memory Speed | 900 MHz | 800 MHz |
| 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 |
| DirectX Version | DirectX 11 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 3.0 |
| Power (Max TDP) | 150 watts | (N/A) watts |
| Shader Model | 5.0 | 4.1 |
| Bandwidth | 86400 MB/sec | 102400 MB/sec |
| Texel Rate | 37800 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 16200 Mpixels/sec | 9600 Mpixels/sec |
Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
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