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Radeon HD 4850 2GB vs Radeon HD 6670 (OEM) 1GB
Intro
The Radeon HD 4850 2GB comes with a core clock frequency of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.Compare that to the Radeon HD 6670 (OEM) 1GB, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 480 SPUs, 24 TAUs, and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) 1GB |
|
63 Watts |
| Radeon HD 4850 2GB |
|
110 Watts |
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Memory Bandwidth
Performance-wise, the Radeon HD 6670 (OEM) 1GB should in theory be a bit better than the Radeon HD 4850 2GB overall. (explain)
| Radeon HD 6670 (OEM) 1GB |
|
64000 MB/sec |
| Radeon HD 4850 2GB |
|
63552 MB/sec |
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Texel Rate
The Radeon HD 4850 2GB should be a lot (more or less 30%) better at AF than the Radeon HD 6670 (OEM) 1GB. (explain)| Radeon HD 4850 2GB |
|
25000 Mtexels/sec |
| Radeon HD 6670 (OEM) 1GB |
|
19200 Mtexels/sec |
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Pixel Rate
The Radeon HD 4850 2GB should be quite a bit (more or less 56%) better at anti-aliasing than the Radeon HD 6670 (OEM) 1GB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)| Radeon HD 4850 2GB |
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10000 Mpixels/sec |
| Radeon HD 6670 (OEM) 1GB |
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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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Radeon HD 4850 2GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6670 (OEM) 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Specifications
| Model | Radeon HD 4850 2GB | Radeon HD 6670 (OEM) 1GB |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | Jun 25, 2008 | February 2011 |
| Code Name | RV770 PRO | Turks |
| Fab Process | 55 nm | 40 nm |
| Bus | PCIe 2.0 x16 | PCIe 2.1 x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 625 MHz | 800 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 993 MHz | 1000 MHz |
| 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 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
| Power (Max TDP) | 110 watts | 63 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 63552 MB/sec | 64000 MB/sec |
| Texel Rate | 25000 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 10000 Mpixels/sec | 6400 Mpixels/sec |
Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock 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 in a second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core 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 is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
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