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Radeon HD 7870 vs Radeon R9 270
Intro
The Radeon HD 7870 comes with a GPU clock speed of 1000 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1200 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.Compare that to the Radeon R9 270, which makes use of a 28 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory runs at a speed of 1400 MHz on this model. It features 1280 SPUs along with 80 Texture Address Units 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 |
| Radeon R9 270 |
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5940 points |
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Ethereum Mining Hash Rate
| Radeon HD 7870 |
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16 Mh/s |
| Radeon R9 270 |
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15 Mh/s |
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Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon R9 270 |
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150 Watts |
| Radeon HD 7870 |
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175 Watts |
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Memory Bandwidth
The Radeon R9 270, in theory, should perform a little bit faster than the Radeon HD 7870 overall. (explain)
| Radeon R9 270 |
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179200 MB/sec |
| Radeon HD 7870 |
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153600 MB/sec |
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Texel Rate
The Radeon HD 7870 should be just a bit (approximately 11%) more effective at anisotropic filtering than the Radeon R9 270. (explain)| Radeon HD 7870 |
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80000 Mtexels/sec |
| Radeon R9 270 |
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72000 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 7870 is superior to the Radeon R9 270, not by a very large margin though. (explain)| Radeon HD 7870 |
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32000 Mpixels/sec |
| Radeon R9 270 |
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28800 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
Radeon HD 7870Amazon.com
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Radeon R9 270Amazon.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 | Radeon HD 7870 | Radeon R9 270 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | March 2012 | November 2013 |
| Code Name | Pitcairn XT | Curacao Pro |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 1000 MHz | 900 MHz |
| Memory Speed | 4800 MHz | 5600 MHz |
| Power (Max TDP) | 175 watts | 150 watts |
| Bandwidth | 153600 MB/sec | 179200 MB/sec |
| Texel Rate | 80000 Mtexels/sec | 72000 Mtexels/sec |
| Pixel Rate | 32000 Mpixels/sec | 28800 Mpixels/sec |
| Unified Shaders | 1280 | 1280 |
| Texture Mapping Units | 80 | 80 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | 2800 million | 2800 million |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11.1 | DirectX 11.2 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.3 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video 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 chip could possibly record to its local memory in a 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 - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 ability to get to the max fill rate.
Radeon HD 7870Amazon.com
|
Radeon R9 270Amazon.com
|
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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