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Radeon HD 4870 1GB vs Radeon HD 6750 1GB
Intro
The Radeon HD 4870 1GB has a core clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.Compare all that to the Radeon HD 6750 1GB, which makes use of a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular card. It features 720 SPUs along with 36 TAUs and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6750 1GB |
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86 Watts |
| Radeon HD 4870 1GB |
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150 Watts |
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Memory Bandwidth
Performance-wise, the Radeon HD 4870 1GB should in theory be a lot superior to the Radeon HD 6750 1GB overall. (explain)
| Radeon HD 4870 1GB |
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115200 MB/sec |
| Radeon HD 6750 1GB |
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64000 MB/sec |
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Texel Rate
The Radeon HD 4870 1GB is just a bit (approximately 15%) better at anisotropic filtering than the Radeon HD 6750 1GB. (explain)| Radeon HD 4870 1GB |
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30000 Mtexels/sec |
| Radeon HD 6750 1GB |
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26100 Mtexels/sec |
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Pixel Rate
The Radeon HD 4870 1GB will be just a bit (about 3%) faster with regards to anti-aliasing than the Radeon HD 6750 1GB, and capable of handling higher resolutions more effectively. (explain)| Radeon HD 4870 1GB |
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12000 Mpixels/sec |
| Radeon HD 6750 1GB |
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11600 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 6750 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 | Radeon HD 4870 1GB | Radeon HD 6750 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | January 2011 |
| Code Name | RV770 XT | Juniper Pro |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 750 MHz | 725 MHz |
| Memory Speed | 3600 MHz | 4000 MHz |
| Power (Max TDP) | 150 watts | 86 watts |
| Bandwidth | 115200 MB/sec | 64000 MB/sec |
| Texel Rate | 30000 Mtexels/sec | 26100 Mtexels/sec |
| Pixel Rate | 12000 Mpixels/sec | 11600 Mpixels/sec |
| Unified Shaders | 800(160x5) | 720 |
| Texture Mapping Units | 40 | 36 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 1040 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: Bandwidth is the max amount of data (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 4870 1GBAmazon.com
Check prices at:
|
Radeon HD 6750 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.
|
Comments
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