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GeForce GT 320 vs GeForce GT 420
Intro
The GeForce GT 320 uses a 40 nm design. nVidia has clocked the core frequency at 540 MHz. The GDDR3 RAM works at a frequency of 790 MHz on this model. It features 72 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.Compare that to the GeForce GT 420, which uses a 40 nm design. nVidia has set the core frequency at 700 MHz. The GDDR3 memory is set to run at a speed of 900 MHz on this specific card. It features 48 SPUs as well as 8 Texture Address Units and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 320 |
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43 Watts |
| GeForce GT 420 |
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50 Watts |
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Memory Bandwidth
Performance-wise, the GeForce GT 420 should theoretically be a little bit superior to the GeForce GT 320 in general. (explain)
| GeForce GT 420 |
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28800 MB/sec |
| GeForce GT 320 |
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25280 MB/sec |
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Texel Rate
The GeForce GT 320 is much (about 131%) more effective at AF than the GeForce GT 420. (explain)| GeForce GT 320 |
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12960 Mtexels/sec |
| GeForce GT 420 |
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5600 Mtexels/sec |
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Pixel Rate
The GeForce GT 320 will be much (about 54%) faster with regards to AA than the GeForce GT 420, and should be capable of handling higher screen resolutions without losing too much performance. (explain)| GeForce GT 320 |
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4320 Mpixels/sec |
| GeForce GT 420 |
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2800 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
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GeForce GT 420Amazon.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 | GeForce GT 420 |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | February 2010 | September 2010 |
| Code Name | GT215 | GF108 |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 540 MHz | 700 MHz |
| Memory Speed | 1580 MHz | 1800 MHz |
| Power (Max TDP) | 43 watts | 50 watts |
| Bandwidth | 25280 MB/sec | 28800 MB/sec |
| Texel Rate | 12960 Mtexels/sec | 5600 Mtexels/sec |
| Pixel Rate | 4320 Mpixels/sec | 2800 Mpixels/sec |
| Unified Shaders | 72 | 48 |
| Texture Mapping Units | 24 | 8 |
| Render Output Units | 8 | 4 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 727 million | 585 million |
| Bus | PCIe x16 | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.3 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
GeForce GT 320Amazon.com
Check prices at:
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GeForce GT 420Amazon.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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