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GeForce GT 320 vs GeForce GT 420
Intro
The GeForce GT 320 has a GPU core speed of 540 MHz, and the 1024 MB of GDDR3 RAM is set to run at 790 MHz through a 128-bit bus. It also features 72 SPUs, 24 TAUs, and 8 Raster Operation Units.Compare all that to the GeForce GT 420, which has a clock speed of 700 MHz and a GDDR3 memory speed of 900 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is made up of 48 SPUs, 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
Theoretically speaking, the GeForce GT 420 should be just a bit faster than 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 should be a lot (more or less 131%) more effective at anisotropic filtering 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 is much (approximately 54%) more effective at full screen anti-aliasing than the GeForce GT 420, and also capable of handling higher resolutions more effectively. (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
Check prices at:
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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: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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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