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Radeon HD 7950 3GB vs Radeon HD 7970
Intro
The Radeon HD 7950 3GB makes use of a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this model. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.Compare all of that to the Radeon HD 7970, which uses a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 RAM works at a speed of 1375 MHz on this specific model. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7950 3GB |
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200 Watts |
| Radeon HD 7970 |
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250 Watts |
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Memory Bandwidth
In theory, the Radeon HD 7970 should be 10% faster than the Radeon HD 7950 3GB overall, because of its higher data rate. (explain)
| Radeon HD 7970 |
|
264000 MB/sec |
| Radeon HD 7950 3GB |
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240000 MB/sec |
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Texel Rate
The Radeon HD 7970 will be much (more or less 32%) more effective at AF than the Radeon HD 7950 3GB. (explain)| Radeon HD 7970 |
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118400 Mtexels/sec |
| Radeon HD 7950 3GB |
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89600 Mtexels/sec |
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Pixel Rate
If using lots of anti-aliasing is important to you, then the Radeon HD 7970 is superior to the Radeon HD 7950 3GB, but not by far. (explain)| Radeon HD 7970 |
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29600 Mpixels/sec |
| Radeon HD 7950 3GB |
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25600 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 7950 3GBAmazon.com
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Radeon HD 7970Amazon.com
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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 7950 3GB | Radeon HD 7970 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | January 2012 | January 2012 |
| Code Name | Tahiti Pro | Tahiti XT |
| Memory | 3072 MB | 3072 MB |
| Core Speed | 800 MHz | 925 MHz |
| Memory Speed | 5000 MHz | 5500 MHz |
| Power (Max TDP) | 200 watts | 250 watts |
| Bandwidth | 240000 MB/sec | 264000 MB/sec |
| Texel Rate | 89600 Mtexels/sec | 118400 Mtexels/sec |
| Pixel Rate | 25600 Mpixels/sec | 29600 Mpixels/sec |
| Unified Shaders | 1792 | 2048 |
| Texture Mapping Units | 112 | 128 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 384-bit | 384-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | 4313 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: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must 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 AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
Radeon HD 7950 3GBAmazon.com
Check prices at:
|
Radeon HD 7970Amazon.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
7 Responses to “Radeon HD 7950 3GB vs Radeon HD 7970”currently the 7950 has more bang for the buck imo
Ryan this is true, but I have the 7970 Crossfire and it is amazing. Only issue that I have is sudden frame drops for a second or two when I am playing games like Far Cry 3 or Battlefield 3. Frame rate drops from 158 to 49 and for the 7950, I haven't heard of a such issue, but the clocking speeds of the 7950 are better as well.
They are working on fuzzing the frame stuttering issue as we speak. It should enable the cards to communicate better so they don't drop as many frames.
Fixing lol not fuzzing
What is best hd 7990 or 7970 in crossfire?
The 7990 is like 2x 7950 on a single PCB vs 2x 7970 in CFX which means that the 7970s would be a better choice. but for price per preformance the 7990 would be the best deal.
That's not true Rugged. The 7990 has two 7970s on it, NOT two 7950s. The 7990 and 7970 x2 would be approximately equal to each other, depending on the particular brand's clock speeds.