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Geforce GTX 670 vs Radeon HD 7950 3GB
Intro
The Geforce GTX 670 uses a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 memory runs at a speed of 1500 MHz on this card. It features 1344 SPUs along with 112 TAUs and 32 ROPs.Compare those specifications to the Radeon HD 7950 3GB, which uses a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this specific model. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Geforce GTX 670 |
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170 Watts |
| Radeon HD 7950 3GB |
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200 Watts |
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Memory Bandwidth
The Radeon HD 7950 3GB should theoretically be much faster than the Geforce GTX 670 in general. (explain)
| Radeon HD 7950 3GB |
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240000 MB/sec |
| Geforce GTX 670 |
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192000 MB/sec |
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Texel Rate
The Geforce GTX 670 should be a bit (more or less 14%) more effective at AF than the Radeon HD 7950 3GB. (explain)| Geforce GTX 670 |
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102480 Mtexels/sec |
| Radeon HD 7950 3GB |
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89600 Mtexels/sec |
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Pixel Rate
The Geforce GTX 670 will be a small bit (approximately 14%) faster with regards to FSAA than the Radeon HD 7950 3GB, and also will be able to handle higher resolutions better. (explain)| Geforce GTX 670 |
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29280 Mpixels/sec |
| Radeon HD 7950 3GB |
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25600 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 GTX 670Amazon.com
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Radeon HD 7950 3GBAmazon.com
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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 GTX 670 | Radeon HD 7950 3GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | May 2012 | January 2012 |
| Code Name | GK104 | Tahiti Pro |
| Fab Process | 28 nm | 28 nm |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Memory | 2048 MB | 3072 MB |
| Core Speed | 915 MHz | 800 MHz |
| Shader Speed | 915 MHz | (N/A) MHz |
| Memory Speed | 1500 MHz (6000 MHz effective) | 1250 MHz (5000 MHz effective) |
| Unified Shaders | 1344 | 1792 |
| Texture Mapping Units | 112 | 112 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 384-bit |
| DirectX Version | DirectX 11.0 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.2 |
| Power (Max TDP) | 170 watts | 200 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 192000 MB/sec | 240000 MB/sec |
| Texel Rate | 102480 Mtexels/sec | 89600 Mtexels/sec |
| Pixel Rate | 29280 Mpixels/sec | 25600 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
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