 |
 |
Radeon HD 5770 vs Radeon HD 7870
Intro
The Radeon HD 5770 comes with a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.Compare those specs to the Radeon HD 7870, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5770 |
|
108 Watts |
| Radeon HD 7870 |
|
175 Watts |
|
|
Memory Bandwidth
The Radeon HD 7870 should in theory perform much faster than the Radeon HD 5770 in general. (explain)
| Radeon HD 7870 |
|
153600 MB/sec |
| Radeon HD 5770 |
|
76800 MB/sec |
|
|
Texel Rate
The Radeon HD 7870 is quite a bit (more or less 135%) faster with regards to texture filtering than the Radeon HD 5770. (explain)| Radeon HD 7870 |
|
80000 Mtexels/sec |
| Radeon HD 5770 |
|
34000 Mtexels/sec |
|
|
Pixel Rate
The Radeon HD 7870 will be much (more or less 135%) better at anti-aliasing than the Radeon HD 5770, and able to handle higher resolutions more effectively. (explain)| Radeon HD 7870 |
|
32000 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 7870Amazon.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 7870 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | October 13, 2009 | March 2012 |
| Code Name | Juniper XT | Pitcairn XT |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 850 MHz | 1000 MHz |
| Memory Speed | 4800 MHz | 4800 MHz |
| Power (Max TDP) | 108 watts | 175 watts |
| Bandwidth | 76800 MB/sec | 153600 MB/sec |
| Texel Rate | 34000 Mtexels/sec | 80000 Mtexels/sec |
| Pixel Rate | 13600 Mpixels/sec | 32000 Mpixels/sec |
| Unified Shaders | 800(160x5) | 1280 |
| Texture Mapping Units | 40 | 80 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 1040 million | 2800 million |
| Bus | PCIe 2.1 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.2 |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core clock 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 most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called 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 of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.
Radeon HD 5770Amazon.com
Check prices at:
|
Radeon HD 7870Amazon.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 5770 vs Radeon HD 7870”[...] Wechsel von 5770 auf 7870 ohne wirkliche Verbesserung Nur mal so... Radeon HD 5770 vs Radeon HD 7870 – Performance Comparison Benchmarks @ Hardware Compare Zitieren + [...]