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Radeon HD 3870 1GB vs Radeon HD 5770
Intro
The Radeon HD 3870 1GB uses a 55 nm design. AMD has clocked the core speed at 775 MHz. The GDDR4 memory runs at a frequency of 1125 MHz on this particular model. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 ROPs.Compare those specifications to the Radeon HD 5770, which features GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 3870 1GB |
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106 Watts |
| Radeon HD 5770 |
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108 Watts |
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Memory Bandwidth
In theory, the Radeon HD 5770 should be 7% faster than the Radeon HD 3870 1GB overall, due to its greater bandwidth. (explain)
| Radeon HD 5770 |
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76800 MB/sec |
| Radeon HD 3870 1GB |
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72000 MB/sec |
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Texel Rate
The Radeon HD 5770 should be much (more or less 174%) faster with regards to anisotropic filtering than the Radeon HD 3870 1GB. (explain)| Radeon HD 5770 |
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34000 Mtexels/sec |
| Radeon HD 3870 1GB |
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12400 Mtexels/sec |
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Pixel Rate
The Radeon HD 5770 will be just a bit (more or less 10%) faster with regards to full screen anti-aliasing than the Radeon HD 3870 1GB, and also will be capable of handling higher resolutions more effectively. (explain)| Radeon HD 5770 |
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13600 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
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Radeon HD 5770Amazon.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 5770 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Nov 19, 2007 | October 13, 2009 |
| Code Name | RV670 XT | Juniper XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 775 MHz | 850 MHz |
| Memory Speed | 2250 MHz | 4800 MHz |
| Power (Max TDP) | 106 watts | 108 watts |
| Bandwidth | 72000 MB/sec | 76800 MB/sec |
| Texel Rate | 12400 Mtexels/sec | 34000 Mtexels/sec |
| Pixel Rate | 12400 Mpixels/sec | 13600 Mpixels/sec |
| Unified Shaders | 320(64x5) | 800(160x5) |
| 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 2.1 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.2 |
Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
Radeon HD 3870 1GBAmazon.com
Check prices at:
|
Radeon HD 5770Amazon.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 5770”[...] Radeon HD 3870 1GB vs Radeon HD 5770 – Performance …Radeon HD 3870 1GB vs Radeon HD 5770. Intro. The Radeon HD 3870 1GB has core clock speeds of 775 MHz on the GPU, and 1125 MHz on the 1024 MB of … [...]