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GeForce GTX 660 vs Radeon HD 7870
Intro
The GeForce GTX 660 has a core clock frequency of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also makes use of a 192-bit memory bus, and uses a 28 nm design. It is comprised of 960 SPUs, 80 TAUs, and 24 ROPs.Compare those specs to the Radeon HD 7870, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 1200 MHz on this card. It features 1280 SPUs along with 80 TAUs and 32 Rasterization Operator Units.
Benchmarks
These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.
3DMark Fire Strike Graphics Score
| Radeon HD 7870 |
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6230 points |
| GeForce GTX 660 |
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5063 points |
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Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GTX 660 |
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140 Watts |
| Radeon HD 7870 |
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175 Watts |
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Memory Bandwidth
In theory, the Radeon HD 7870 should be a bit faster than the GeForce GTX 660 in general. (explain)
| Radeon HD 7870 |
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153600 MB/sec |
| GeForce GTX 660 |
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144192 MB/sec |
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Texel Rate
The Radeon HD 7870 should be a little bit (more or less 2%) better at anisotropic filtering than the GeForce GTX 660. (explain)| Radeon HD 7870 |
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80000 Mtexels/sec |
| GeForce GTX 660 |
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78400 Mtexels/sec |
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Pixel Rate
If using a high resolution is important to you, then the Radeon HD 7870 is superior to the GeForce GTX 660, by far. (explain)| Radeon HD 7870 |
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32000 Mpixels/sec |
| GeForce GTX 660 |
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23520 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 660Amazon.com
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Radeon HD 7870Amazon.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 660 | Radeon HD 7870 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | September 2012 | March 2012 |
| Code Name | GK106 | Pitcairn XT |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 980 MHz | 1000 MHz |
| Memory Speed | 6008 MHz | 4800 MHz |
| Power (Max TDP) | 140 watts | 175 watts |
| Bandwidth | 144192 MB/sec | 153600 MB/sec |
| Texel Rate | 78400 Mtexels/sec | 80000 Mtexels/sec |
| Pixel Rate | 23520 Mpixels/sec | 32000 Mpixels/sec |
| Unified Shaders | 960 | 1280 |
| Texture Mapping Units | 80 | 80 |
| Render Output Units | 24 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 256-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | 2540 million | 2800 million |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11.0 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.2 |
Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.
GeForce GTX 660Amazon.com
Check prices at:
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Radeon HD 7870Amazon.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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Comments
2 Responses to “GeForce GTX 660 vs Radeon HD 7870”[...] von AMD. Preislich auch um die 200€. Wenn du einen Vergleich deiner 660 und der 7870 möchtest Vergleich 660 mit 7870 Hierbei muss jedoch beachtet werden, das dieser Vergleich nur auf den reinen Daten basiert. [...]
HD 7870 is fair bit faster on paper, but the difference is greater in real world applications. Depending on the price (near enough identical in Australia, as of March 2013), go the HD7870. GTX660 is crippled by its memory bandwidth :c