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GeForce GT 310 vs GeForce GT 420
Intro
The GeForce GT 310 has clock speeds of 589 MHz on the GPU, and 1000 MHz on the 512 MB of DDR2 memory. It features 16 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.Compare those specifications to the GeForce GT 420, which uses a 40 nm design. nVidia has clocked the core frequency at 700 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this card. It features 48 SPUs along with 8 Texture Address Units and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 310 |
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31 Watts |
| GeForce GT 420 |
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50 Watts |
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Memory Bandwidth
In theory, the GeForce GT 420 should be much faster than the GeForce GT 310 in general. (explain)
| GeForce GT 420 |
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28800 MB/sec |
| GeForce GT 310 |
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16000 MB/sec |
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Texel Rate
The GeForce GT 420 should be a bit (about 19%) better at anisotropic filtering than the GeForce GT 310. (explain)| GeForce GT 420 |
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5600 Mtexels/sec |
| GeForce GT 310 |
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4712 Mtexels/sec |
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Pixel Rate
The GeForce GT 420 is just a bit (more or less 19%) more effective at full screen anti-aliasing than the GeForce GT 310, and will be capable of handling higher screen resolutions more effectively. (explain)| GeForce GT 420 |
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2800 Mpixels/sec |
| GeForce GT 310 |
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2356 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 GT 310Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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GeForce GT 420Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GT 310 | GeForce GT 420 |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | November 2009 | September 2010 |
| Code Name | GT218 | GF108 |
| Fab Process | 40 nm | 40 nm |
| Bus | PCIe 2.0 | PCIe x16 |
| Memory | 512 MB | 2048 MB |
| Core Speed | 589 MHz | 700 MHz |
| Shader Speed | 1402 MHz | 1400 MHz |
| Memory Speed | 1000 MHz (2000 MHz effective) | 900 MHz (1800 MHz effective) |
| Unified Shaders | 16 | 48 |
| Texture Mapping Units | 8 | 8 |
| Render Output Units | 4 | 4 |
| Bus Type | DDR2 | GDDR3 |
| Bus Width | 64-bit | 128-bit |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.1 | OpenGL 4.1 |
| Power (Max TDP) | 31 watts | 50 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 16000 MB/sec | 28800 MB/sec |
| Texel Rate | 4712 Mtexels/sec | 5600 Mtexels/sec |
| Pixel Rate | 2356 Mpixels/sec | 2800 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are processed per second. This figure is calculated 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 a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 reach the maximum fill rate.
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