 |
 |
Radeon HD 3870 1GB vs Radeon HD 5770
Intro
The Radeon HD 3870 1GB comes with a GPU core speed of 775 MHz, and the 1024 MB of GDDR4 RAM is set to run at 1125 MHz through a 256-bit bus. It also is comprised of 320(64x5) Stream Processors, 16 Texture Address Units, and 16 Raster Operation Units.Compare all that to the Radeon HD 5770, which features clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 3870 1GB |
|
106 Watts |
| Radeon HD 5770 |
|
108 Watts |
|
|
Memory Bandwidth
Performance-wise, the Radeon HD 5770 should theoretically be just a bit better than the Radeon HD 3870 1GB in general. (explain)
| Radeon HD 5770 |
|
76800 MB/sec |
| Radeon HD 3870 1GB |
|
72000 MB/sec |
|
|
Texel Rate
The Radeon HD 5770 will be a lot (about 174%) faster with regards to anisotropic filtering than the Radeon HD 3870 1GB. (explain)| Radeon HD 5770 |
|
34000 Mtexels/sec |
| Radeon HD 3870 1GB |
|
12400 Mtexels/sec |
|
|
Pixel Rate
The Radeon HD 5770 will be a little bit (approximately 10%) more effective at anti-aliasing than the Radeon HD 3870 1GB, and capable of handling higher screen resolutions without slowing down too much. (explain)| Radeon HD 5770 |
|
13600 Mpixels/sec |
| Radeon HD 3870 1GB |
|
12400 Mpixels/sec |
|
|
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:
|
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.
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 maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. 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 also depends on quite a few other factors, most notably the memory bandwidth of the card - 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 … [...]