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Radeon HD 4890 1GB vs Radeon HD 6750 1GB
Intro
The Radeon HD 4890 1GB comes with a clock speed of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.Compare that to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 memory works at a speed of 1000 MHz on this specific model. It features 720 SPUs as well as 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 4890 1GB |
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190 Watts |
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Memory Bandwidth
The Radeon HD 4890 1GB should theoretically perform much faster than the Radeon HD 6750 1GB in general. (explain)
| Radeon HD 4890 1GB |
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124800 MB/sec |
| Radeon HD 6750 1GB |
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64000 MB/sec |
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Texel Rate
The Radeon HD 4890 1GB should be much (more or less 53%) better at anisotropic filtering than the Radeon HD 6750 1GB. (explain)| Radeon HD 4890 1GB |
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40000 Mtexels/sec |
| Radeon HD 6750 1GB |
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26100 Mtexels/sec |
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Pixel Rate
The Radeon HD 4890 1GB should be quite a bit (approximately 38%) better at anti-aliasing than the Radeon HD 6750 1GB, and also will be capable of handling higher resolutions while still performing well. (explain)| Radeon HD 4890 1GB |
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16000 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 4890 1GBAmazon.com
Check prices at:
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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 4890 1GB | Radeon HD 6750 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Apr 2, 2009 | January 2011 |
| Code Name | RV790 XT | Juniper Pro |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 1000 MHz | 725 MHz |
| Memory Speed | 3900 MHz | 4000 MHz |
| Power (Max TDP) | 190 watts | 86 watts |
| Bandwidth | 124800 MB/sec | 64000 MB/sec |
| Texel Rate | 40000 Mtexels/sec | 26100 Mtexels/sec |
| Pixel Rate | 16000 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 | 959 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 largest amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core 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 most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.
Radeon HD 4890 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.
|
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