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Radeon HD 4850 512MB vs Radeon HD 6770 1GB
Intro
The Radeon HD 4850 512MB comes with clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.Compare those specs to the Radeon HD 6770 1GB, which comes with a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is made up of 800 SPUs, 40 TAUs, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6770 1GB |
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108 Watts |
| Radeon HD 4850 512MB |
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110 Watts |
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Memory Bandwidth
The Radeon HD 6770 1GB should theoretically perform a bit faster than the Radeon HD 4850 512MB overall. (explain)
| Radeon HD 6770 1GB |
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67200 MB/sec |
| Radeon HD 4850 512MB |
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63552 MB/sec |
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Texel Rate
The Radeon HD 6770 1GB will be quite a bit (about 44%) more effective at anisotropic filtering than the Radeon HD 4850 512MB. (explain)| Radeon HD 6770 1GB |
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36000 Mtexels/sec |
| Radeon HD 4850 512MB |
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25000 Mtexels/sec |
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Pixel Rate
If running with lots of anti-aliasing is important to you, then the Radeon HD 6770 1GB is a better choice, by a large margin. (explain)| Radeon HD 6770 1GB |
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14400 Mpixels/sec |
| Radeon HD 4850 512MB |
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10000 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 512MBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6770 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 4850 512MB | Radeon HD 6770 1GB |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | Jun 25, 2008 | January 2011 |
| Code Name | RV770 PRO | Juniper XT |
| Fab Process | 55 nm | 40 nm |
| Bus | PCIe 2.0 x16 | PCIe x16 |
| Memory | 512 MB | 1024 MB |
| Core Speed | 625 MHz | 900 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 993 MHz | 1050 MHz |
| Unified Shaders | 800(160x5) | 800 |
| Texture Mapping Units | 40 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR3 | 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 | 108 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 63552 MB/sec | 67200 MB/sec |
| Texel Rate | 25000 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 10000 Mpixels/sec | 14400 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 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 applied in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines 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 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.
Comments
One Response to “Radeon HD 4850 512MB vs Radeon HD 6770 1GB”[...] #2 i would probably choose option 1, this is due to the faster graphic card. 1tb enough memory also. and if its an old mac there is a possibility to have a older cpu. thats just my opinion. Radeon HD 4850 512MB vs Radeon HD 6770 1GB – Performance Comparison Benchmarks @ Hardware Comp... [...]