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Radeon HD 3870 1GB vs Radeon HD 5770
Intro
The Radeon HD 3870 1GB features core clock speeds of 775 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR4 memory. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.Compare that to the Radeon HD 5770, which uses a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 memory works at a frequency of 1200 MHz on this particular model. It features 800(160x5) SPUs as well as 40 TAUs 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
Performance-wise, the Radeon HD 5770 should theoretically be just a bit superior to the Radeon HD 3870 1GB in general. (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 quite a bit (approximately 174%) more effective at 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
If using lots of anti-aliasing is important to you, then the Radeon HD 5770 is a better choice, not by a very large margin though. (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be processed per second. This figure is worked out by multiplying the total amount of texture units 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 a second.
Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum 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 … [...]