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GeForce GT 420 vs GeForce GTX 650
Intro
The GeForce GT 420 comes with core speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 RAM. It features 48 SPUs along with 8 TAUs and 4 ROPs.Compare those specs to the GeForce GTX 650, which comes with core speeds of 1058 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 384 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 420 |
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50 Watts |
| GeForce GTX 650 |
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64 Watts |
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Memory Bandwidth
The GeForce GTX 650 should in theory be a lot faster than the GeForce GT 420 overall. (explain)
| GeForce GTX 650 |
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80000 MB/sec |
| GeForce GT 420 |
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28800 MB/sec |
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Texel Rate
The GeForce GTX 650 is a lot (approximately 505%) more effective at texture filtering than the GeForce GT 420. (explain)| GeForce GTX 650 |
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33856 Mtexels/sec |
| GeForce GT 420 |
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5600 Mtexels/sec |
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Pixel Rate
If running with a high resolution is important to you, then the GeForce GTX 650 is the winner, by a large margin. (explain)| GeForce GTX 650 |
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16928 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
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 420Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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GeForce GTX 650Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GT 420 | GeForce GTX 650 |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | September 2010 | September 2012 |
| Code Name | GF108 | GK107 |
| Fab Process | 40 nm | 28 nm |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 700 MHz | 1058 MHz |
| Shader Speed | 1400 MHz | 1058 MHz |
| Memory Speed | 900 MHz (1800 MHz effective) | 1250 MHz (5000 MHz effective) |
| Unified Shaders | 48 | 384 |
| Texture Mapping Units | 8 | 32 |
| Render Output Units | 4 | 16 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.3 |
| Power (Max TDP) | 50 watts | 64 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 28800 MB/sec | 80000 MB/sec |
| Texel Rate | 5600 Mtexels/sec | 33856 Mtexels/sec |
| Pixel Rate | 2800 Mpixels/sec | 16928 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record 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 core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
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