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Radeon HD 4870 1GB vs Radeon HD 6870
Intro
The Radeon HD 4870 1GB features a GPU clock speed of 750 MHz, and the 1024 MB of GDDR5 memory is set to run at 900 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.Compare those specifications to the Radeon HD 6870, which comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 256-bit memory bus, and uses a 40 nm design. It features 1120 SPUs, 56 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4870 1GB |
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150 Watts |
| Radeon HD 6870 |
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151 Watts |
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Memory Bandwidth
Theoretically, the Radeon HD 6870 should be a bit faster than the Radeon HD 4870 1GB overall. (explain)
| Radeon HD 6870 |
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134400 MB/sec |
| Radeon HD 4870 1GB |
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115200 MB/sec |
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Texel Rate
The Radeon HD 6870 will be quite a bit (about 68%) faster with regards to texture filtering than the Radeon HD 4870 1GB. (explain)| Radeon HD 6870 |
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50400 Mtexels/sec |
| Radeon HD 4870 1GB |
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30000 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the Radeon HD 6870 is the winner, by a large margin. (explain)| Radeon HD 6870 |
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28800 Mpixels/sec |
| Radeon HD 4870 1GB |
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12000 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 4870 1GBAmazon.com
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Radeon HD 6870Amazon.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 4870 1GB | Radeon HD 6870 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | October 2010 |
| Code Name | RV770 XT | Barts XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 750 MHz | 900 MHz |
| Memory Speed | 3600 MHz | 4200 MHz |
| Power (Max TDP) | 150 watts | 151 watts |
| Bandwidth | 115200 MB/sec | 134400 MB/sec |
| Texel Rate | 30000 Mtexels/sec | 50400 Mtexels/sec |
| Pixel Rate | 12000 Mpixels/sec | 28800 Mpixels/sec |
| Unified Shaders | 800(160x5) | 1120 |
| Texture Mapping Units | 40 | 56 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 1700 million |
| Bus | PCIe 2.0 x16 | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 4870 1GBAmazon.com
Check prices at:
|
Radeon HD 6870Amazon.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.
|
Comments
One Response to “Radeon HD 4870 1GB vs Radeon HD 6870”[...] Einiges an Hardware... nachfolger sind in der regel immer besser Radeon HD 4870 1GB vs Radeon HD 6870 – Performance Comparison Benchmarks @ Hardware Compare dadazu kommt noch das die 6870 nicht nur schneller sondern auch mehr futures hat DirectX11 usw. [...]