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Radeon HD 7770 vs Radeon HD 7950
Intro
The Radeon HD 7770 features a core clock speed of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.Compare all that to the Radeon HD 7950, which uses a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this model. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.
Benchmarks
These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.
3DMark Fire Strike Graphics Score
| Radeon HD 7950 |
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7731 points |
| Radeon HD 7770 |
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3180 points |
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Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7770 |
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80 Watts |
| Radeon HD 7950 |
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200 Watts |
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Memory Bandwidth
The Radeon HD 7950, in theory, should perform much faster than the Radeon HD 7770 in general. (explain)
| Radeon HD 7950 |
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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 should be much (more or less 124%) faster with regards to AF than the Radeon HD 7770. (explain)| Radeon HD 7950 |
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89600 Mtexels/sec |
| Radeon HD 7770 |
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40000 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 7950 is a better choice, and very much so. (explain)| Radeon HD 7950 |
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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
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Radeon HD 7950Amazon.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 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | February 2012 | January 2012 |
| Code Name | Cape Verde XT | Tahiti Pro |
| Memory | 1024 MB | 1536 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 (in units of MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core 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 processed per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
Radeon HD 7770Amazon.com
Check prices at:
|
Radeon HD 7950Amazon.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.
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Comments
3 Responses to “Radeon HD 7770 vs Radeon HD 7950”i have a 7770 and i play bf3 on low settings with a little lag but will upgrading it to the 7970 be doing me any good and would it handle BF4?
Hey firewolf i'm running a 7770 to. On bf3 im playing 1080p, high setting, and around 30fps. What is your processor? U might need to uprgade ur cpu rather than your gpu.
I have a 7770, with a 3.5ghz quadcore could play bf4 on normal, upgraded to 8core and play on ultra.