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Radeon HD 7770 vs Radeon HD 7950 3GB
Intro
The Radeon HD 7770 features a GPU clock speed of 1000 MHz, and the 1024 MB of GDDR5 memory runs at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.Compare all that to the Radeon HD 7950 3GB, which has a clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It is comprised of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7770 |
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80 Watts |
| Radeon HD 7950 3GB |
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200 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 7950 3GB should be a lot faster than the Radeon HD 7770 overall. (explain)
| Radeon HD 7950 3GB |
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240000 MB/sec |
| Radeon HD 7770 |
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72000 MB/sec |
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Texel Rate
The Radeon HD 7950 3GB will be much (more or less 124%) faster with regards to texture filtering than the Radeon HD 7770. (explain)| Radeon HD 7950 3GB |
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89600 Mtexels/sec |
| Radeon HD 7770 |
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40000 Mtexels/sec |
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Pixel Rate
The Radeon HD 7950 3GB is much (more or less 60%) more effective at anti-aliasing than the Radeon HD 7770, and also should be able to handle higher screen resolutions without slowing down too much. (explain)| Radeon HD 7950 3GB |
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25600 Mpixels/sec |
| Radeon HD 7770 |
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16000 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 7770Amazon.com
Check prices at:
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Radeon HD 7950 3GBAmazon.com
Check prices at:
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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 7770 | Radeon HD 7950 3GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | February 2012 | January 2012 |
| Code Name | Cape Verde XT | Tahiti Pro |
| Memory | 1024 MB | 3072 MB |
| Core Speed | 1000 MHz | 800 MHz |
| Memory Speed | 4500 MHz | 5000 MHz |
| Power (Max TDP) | 80 watts | 200 watts |
| Bandwidth | 72000 MB/sec | 240000 MB/sec |
| Texel Rate | 40000 Mtexels/sec | 89600 Mtexels/sec |
| Pixel Rate | 16000 Mpixels/sec | 25600 Mpixels/sec |
| Unified Shaders | 640 | 1792 |
| Texture Mapping Units | 40 | 112 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 384-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | 1500 million | 4313 million |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11.1 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.2 |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to reach the max fill rate.
Radeon HD 7770Amazon.com
Check prices at:
|
Radeon HD 7950 3GBAmazon.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
2 Responses to “Radeon HD 7770 vs Radeon HD 7950 3GB”no se olvides de las placas ati serie hd2xxx como la 2900tx que son de 512 bit puros 740 mhz de core y 1024 gddr4
y la linea 7 de nvidia como la 7950gx2 1 gb ram gddr3 256 bit x2 y y los core x2
Brilliant site.
Suggestion....
Can we choose between THREE cards in the future some time?
Much happier; because you can put in your current card and the choice between the two you are looking to buy.