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GeForce GT 450 (OEM) vs Radeon HD 7870
Intro
The GeForce GT 450 (OEM) has a GPU core speed of 790 MHz, and the 1536 MB of GDDR5 memory runs at 1000 MHz through a 192-bit bus. It also is made up of 144 SPUs, 24 TAUs, and 24 ROPs.Compare those specifications to the Radeon HD 7870, which has a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It features 1280 SPUs, 80 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 450 (OEM) |
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106 Watts |
| Radeon HD 7870 |
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175 Watts |
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Memory Bandwidth
In theory, the Radeon HD 7870 should be 60% quicker than the GeForce GT 450 (OEM) in general, due to its greater data rate. (explain)
| Radeon HD 7870 |
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153600 MB/sec |
| GeForce GT 450 (OEM) |
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96000 MB/sec |
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Texel Rate
The Radeon HD 7870 is a lot (about 322%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)| Radeon HD 7870 |
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80000 Mtexels/sec |
| GeForce GT 450 (OEM) |
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18960 Mtexels/sec |
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Pixel Rate
If running with a high screen resolution is important to you, then the Radeon HD 7870 is the winner, and very much so. (explain)| Radeon HD 7870 |
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32000 Mpixels/sec |
| GeForce GT 450 (OEM) |
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18960 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 450 (OEM)Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 7870Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GT 450 (OEM) | Radeon HD 7870 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | October 2010 | March 2012 |
| Code Name | GF106 | Pitcairn XT |
| Fab Process | 40 nm | 28 nm |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| Memory | 1536 MB | 2048 MB |
| Core Speed | 790 MHz | 1000 MHz |
| Shader Speed | 1580 MHz | (N/A) MHz |
| Memory Speed | 1000 MHz (4000 MHz effective) | 1200 MHz (4800 MHz effective) |
| Unified Shaders | 144 | 1280 |
| Texture Mapping Units | 24 | 80 |
| Render Output Units | 24 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 256-bit |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
| Power (Max TDP) | 106 watts | 175 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 96000 MB/sec | 153600 MB/sec |
| Texel Rate | 18960 Mtexels/sec | 80000 Mtexels/sec |
| Pixel Rate | 18960 Mpixels/sec | 32000 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
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