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GeForce GT 320 vs Radeon HD 4790
Intro
The GeForce GT 320 makes use of a 40 nm design. nVidia has clocked the core frequency at 540 MHz. The GDDR3 RAM is set to run at a frequency of 790 MHz on this specific model. It features 72 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.Compare that to the Radeon HD 4790, which comes with GPU core speed of 600 MHz, and 512 MB of GDDR5 RAM set to run at 800 MHz through a 256-bit bus. It also is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
In theory, the Radeon HD 4790 should be 305% quicker than the GeForce GT 320 in general, because of its higher bandwidth. (explain)
| Radeon HD 4790 |
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102400 MB/sec |
| GeForce GT 320 |
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25280 MB/sec |
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Texel Rate
The Radeon HD 4790 will be a lot (about 48%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)| Radeon HD 4790 |
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19200 Mtexels/sec |
| GeForce GT 320 |
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12960 Mtexels/sec |
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Pixel Rate
The Radeon HD 4790 is quite a bit (approximately 122%) better at AA than the GeForce GT 320, and also will be capable of handling higher resolutions while still performing well. (explain)| Radeon HD 4790 |
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9600 Mpixels/sec |
| GeForce GT 320 |
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4320 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 GT 320Amazon.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 GT 320 | Radeon HD 4790 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | February 2010 | 2009 |
| Code Name | GT215 | RV790 |
| Memory | 1024 MB | 512 MB |
| Core Speed | 540 MHz | 600 MHz |
| Memory Speed | 1580 MHz | 3200 MHz |
| Power (Max TDP) | 43 watts | (Unknown) watts |
| Bandwidth | 25280 MB/sec | 102400 MB/sec |
| Texel Rate | 12960 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 4320 Mpixels/sec | 9600 Mpixels/sec |
| Unified Shaders | 72 | 640(128x5) |
| Texture Mapping Units | 24 | 32 |
| Render Output Units | 8 | 16 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 40 nm | 55 nm |
| Transistors | 727 million | 959 million |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.3 | OpenGL 3.0 |
Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are applied per second. This number is worked out 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 applied in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 potential to get to the max fill rate.
GeForce GT 320Amazon.com
Check prices at:
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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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