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GeForce GT 320 vs GeForce GT 420
Intro
The GeForce GT 320 has a clock speed of 540 MHz and a GDDR3 memory speed of 790 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It features 72 SPUs, 24 Texture Address Units, and 8 ROPs.Compare that to the GeForce GT 420, which features a core clock speed of 700 MHz and a GDDR3 memory frequency of 900 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It features 48 SPUs, 8 TAUs, 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
As far as performance goes, the GeForce GT 420 should theoretically be a little bit better than the GeForce GT 320 overall. (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 will be a lot (more or less 131%) better 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 should be a lot (more or less 54%) more effective at FSAA than the GeForce GT 420, and will be able to handle higher resolutions while still performing well. (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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 texture map elements (texels) that can be applied in one second. This 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to 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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