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GeForce GT 420 vs Radeon HD 5670
Intro
The GeForce GT 420 comes with a core clock frequency of 700 MHz and a GDDR3 memory speed of 900 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is comprised of 48 SPUs, 8 Texture Address Units, and 4 ROPs.Compare those specifications to the Radeon HD 5670, which features GPU core speed of 775 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also features 400(80x5) Stream Processors, 20 TAUs, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 420 |
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50 Watts |
| Radeon HD 5670 |
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61 Watts |
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Memory Bandwidth
The Radeon HD 5670 should theoretically be much faster than the GeForce GT 420 overall. (explain)
| Radeon HD 5670 |
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64000 MB/sec |
| GeForce GT 420 |
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28800 MB/sec |
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Texel Rate
The Radeon HD 5670 should be a lot (more or less 177%) faster with regards to AF than the GeForce GT 420. (explain)| Radeon HD 5670 |
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15500 Mtexels/sec |
| GeForce GT 420 |
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5600 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 5670 is a better choice, by a large margin. (explain)| Radeon HD 5670 |
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6200 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 420Amazon.com
Check prices at:
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Radeon HD 5670Amazon.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 420 | Radeon HD 5670 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | September 2010 | January 14, 2010 |
| Code Name | GF108 | Redwood XT |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 700 MHz | 775 MHz |
| Memory Speed | 1800 MHz | 4000 MHz |
| Power (Max TDP) | 50 watts | 61 watts |
| Bandwidth | 28800 MB/sec | 64000 MB/sec |
| Texel Rate | 5600 Mtexels/sec | 15500 Mtexels/sec |
| Pixel Rate | 2800 Mpixels/sec | 6200 Mpixels/sec |
| Unified Shaders | 48 | 400(80x5) |
| Texture Mapping Units | 8 | 20 |
| Render Output Units | 4 | 8 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 585 million | 627 million |
| Bus | PCIe x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 4.1 | OpenGL 3.2 |
Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.
GeForce GT 420Amazon.com
Check prices at:
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Radeon HD 5670Amazon.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.
|
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