 |
 |
Radeon HD 5770 vs Radeon HD 6850
Intro
The Radeon HD 5770 has a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.Compare those specs to the Radeon HD 6850, which comes with core clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs along with 48 Texture Address Units and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5770 |
|
108 Watts |
| Radeon HD 6850 |
|
127 Watts |
|
|
Memory Bandwidth
As far as performance goes, the Radeon HD 6850 should theoretically be much better than the Radeon HD 5770 in general. (explain)
| Radeon HD 6850 |
|
128000 MB/sec |
| Radeon HD 5770 |
|
76800 MB/sec |
|
|
Texel Rate
The Radeon HD 6850 should be a small bit (more or less 9%) better at AF than the Radeon HD 5770. (explain)| Radeon HD 6850 |
|
37200 Mtexels/sec |
| Radeon HD 5770 |
|
34000 Mtexels/sec |
|
|
Pixel Rate
If running with a high resolution is important to you, then the Radeon HD 6850 is superior to the Radeon HD 5770, by a large margin. (explain)| Radeon HD 6850 |
|
24800 Mpixels/sec |
| Radeon HD 5770 |
|
13600 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 5770Amazon.com
Check prices at:
|
Radeon HD 6850Amazon.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 5770 | Radeon HD 6850 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | October 13, 2009 | October 2010 |
| Code Name | Juniper XT | Barts Pro |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 850 MHz | 775 MHz |
| Memory Speed | 4800 MHz | 4000 MHz |
| Power (Max TDP) | 108 watts | 127 watts |
| Bandwidth | 76800 MB/sec | 128000 MB/sec |
| Texel Rate | 34000 Mtexels/sec | 37200 Mtexels/sec |
| Pixel Rate | 13600 Mpixels/sec | 24800 Mpixels/sec |
| Unified Shaders | 800(160x5) | 960 |
| Texture Mapping Units | 40 | 48 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 1040 million | 1700 million |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.1 |
Memory Bandwidth: Memory 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. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 are processed in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling 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 that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 5770Amazon.com
Check prices at:
|
Radeon HD 6850Amazon.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
5 Responses to “Radeon HD 5770 vs Radeon HD 6850”Very helpful review..concise, informative and clear. I like the hot-links so you can examine technical issues in more detail. All in all, well done guys xD
[...] [...]
[...] [...]
5770 2g ddr3 (crossfire) vs 6850 1g ddr5?
Great archival review. I was going to get a 5770 based on a 500watt power supply and I purchased a 6850 because I realized I had access to a 650watt power supply and this review confirmed my hopes that the 6850 is significantly faster!