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Radeon HD 4850 1GB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 4850 1GB features a GPU core clock speed of 625 MHz, and the 1024 MB of GDDR4 memory is set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.Compare all of that to the Radeon HD 6670 (OEM), which comes with a core clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 TAUs, and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
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63 Watts |
| Radeon HD 4850 1GB |
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110 Watts |
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Memory Bandwidth
The Radeon HD 6670 (OEM) should in theory perform just a bit faster than the Radeon HD 4850 1GB overall. (explain)
| Radeon HD 6670 (OEM) |
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64000 MB/sec |
| Radeon HD 4850 1GB |
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63552 MB/sec |
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Texel Rate
The Radeon HD 4850 1GB will be quite a bit (approximately 30%) more effective at AF than the Radeon HD 6670 (OEM). (explain)| Radeon HD 4850 1GB |
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25000 Mtexels/sec |
| Radeon HD 6670 (OEM) |
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19200 Mtexels/sec |
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Pixel Rate
If running with a high resolution is important to you, then the Radeon HD 4850 1GB is the winner, by far. (explain)| Radeon HD 4850 1GB |
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10000 Mpixels/sec |
| Radeon HD 6670 (OEM) |
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6400 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 4850 1GBAmazon.com
Check prices at:
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Radeon HD 6670 (OEM)Amazon.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 4850 1GB | Radeon HD 6670 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | February 2011 |
| Code Name | RV770 PRO | Turks |
| Memory | 1024 MB | 512 MB |
| Core Speed | 625 MHz | 800 MHz |
| Memory Speed | 1986 MHz | 4000 MHz |
| Power (Max TDP) | 110 watts | 63 watts |
| Bandwidth | 63552 MB/sec | 64000 MB/sec |
| Texel Rate | 25000 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 10000 Mpixels/sec | 6400 Mpixels/sec |
| Unified Shaders | 800(160x5) | 480 |
| Texture Mapping Units | 40 | 24 |
| Render Output Units | 16 | 8 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 715 million |
| Bus | PCIe 2.0 x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.
Radeon HD 4850 1GBAmazon.com
Check prices at:
|
Radeon HD 6670 (OEM)Amazon.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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