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Radeon HD 3870 1GB vs Radeon HD 6770
Intro
The Radeon HD 3870 1GB features a core clock speed of 775 MHz and a GDDR4 memory speed of 1125 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.Compare those specs to the Radeon HD 6770, which has a clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 3870 1GB |
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106 Watts |
| Radeon HD 6770 |
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108 Watts |
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Memory Bandwidth
The Radeon HD 3870 1GB, in theory, should perform a little bit faster than the Radeon HD 6770 in general. (explain)
| Radeon HD 3870 1GB |
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72000 MB/sec |
| Radeon HD 6770 |
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67200 MB/sec |
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Texel Rate
The Radeon HD 6770 is quite a bit (about 190%) faster with regards to texture filtering than the Radeon HD 3870 1GB. (explain)| Radeon HD 6770 |
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36000 Mtexels/sec |
| Radeon HD 3870 1GB |
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12400 Mtexels/sec |
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Pixel Rate
The Radeon HD 6770 will be just a bit (about 16%) better at FSAA than the Radeon HD 3870 1GB, and also should be capable of handling higher screen resolutions while still performing well. (explain)| Radeon HD 6770 |
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14400 Mpixels/sec |
| Radeon HD 3870 1GB |
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12400 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 3870 1GBAmazon.com
Check prices at:
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Radeon HD 6770Amazon.com
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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 3870 1GB | Radeon HD 6770 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Nov 19, 2007 | January 2011 |
| Code Name | RV670 XT | Juniper XT |
| Memory | 1024 MB | 512 MB |
| Core Speed | 775 MHz | 900 MHz |
| Memory Speed | 2250 MHz | 4200 MHz |
| Power (Max TDP) | 106 watts | 108 watts |
| Bandwidth | 72000 MB/sec | 67200 MB/sec |
| Texel Rate | 12400 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 12400 Mpixels/sec | 14400 Mpixels/sec |
| Unified Shaders | 320(64x5) | 800 |
| Texture Mapping Units | 16 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | (Unknown) million | 1040 million |
| Bus | PCIe 2.0 x16/AGP 8x | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 3870 1GBAmazon.com
Check prices at:
|
Radeon HD 6770Amazon.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
One Response to “Radeon HD 3870 1GB vs Radeon HD 6770”Cool! I'm really happy the new computer I'll be getting will be able to run Battlefield 3. I would tell you guys about it, but it's an AMAZING deal.. If too many people buy it, it will go way up.. So yeah! Very happy I won't need to build a computer or replace anything in this pre-built one. Merry Christmas everybody!