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Geforce GTX 770 vs Radeon HD 3870 X2 1GB
Intro
The Geforce GTX 770 uses a 28 nm design. nVidia has clocked the core frequency at 1046 MHz. The GDDR5 memory is set to run at a frequency of 1753 MHz on this particular card. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.Compare all that to the Radeon HD 3870 X2 1GB, which features a clock speed of 825 MHz and a GDDR4 memory frequency of 1126 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
The Geforce GTX 770 should theoretically perform a lot faster than the Radeon HD 3870 X2 1GB in general. (explain)
| Geforce GTX 770 |
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224384 MB/sec |
| Radeon HD 3870 X2 1GB |
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144128 MB/sec |
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Texel Rate
The Geforce GTX 770 will be much (about 407%) more effective at texture filtering than the Radeon HD 3870 X2 1GB. (explain)| Geforce GTX 770 |
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133888 Mtexels/sec |
| Radeon HD 3870 X2 1GB |
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26400 Mtexels/sec |
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Pixel Rate
If using lots of anti-aliasing is important to you, then the Geforce GTX 770 is superior to the Radeon HD 3870 X2 1GB, by a large margin. (explain)| Geforce GTX 770 |
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33472 Mpixels/sec |
| Radeon HD 3870 X2 1GB |
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26400 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.
One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.
Price Comparison
Geforce GTX 770Amazon.com
Check prices at:
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Radeon HD 3870 X2 1GBAmazon.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 GTX 770 | Radeon HD 3870 X2 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | May 2013 | Jan 28, 2008 |
| Code Name | GK104 | R680 |
| Memory | 2048 MB | 1024 MB (x2) |
| Core Speed | 1046 MHz | 825 MHz (x2) |
| Memory Speed | 7012 MHz | 2252 MHz (x2) |
| Power (Max TDP) | 230 watts | (Unknown) watts |
| Bandwidth | 224384 MB/sec | 144128 MB/sec |
| Texel Rate | 133888 Mtexels/sec | 26400 Mtexels/sec |
| Pixel Rate | 33472 Mpixels/sec | 26400 Mpixels/sec |
| Unified Shaders | 1536 | 320(64x5) (x2) |
| Texture Mapping Units | 128 | 16 (x2) |
| Render Output Units | 32 | 16 (x2) |
| Bus Type | GDDR5 | GDDR4 |
| Bus Width | 256-bit | 256-bit (x2) |
| Fab Process | 28 nm | 55 nm |
| Transistors | 3540 million | (Unknown) million |
| Bus | PCIe 3.0 x16 | PCIe 2.0 x16/(internal PCIe 1.1 x16) |
| DirectX Version | DirectX 11.0 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.3 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This 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 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 most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.
Geforce GTX 770Amazon.com
Check prices at:
|
Radeon HD 3870 X2 1GBAmazon.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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