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Radeon HD 7950 vs Radeon HD 7950 3GB
Intro
The Radeon HD 7950 comes with a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.Compare all of that to the Radeon HD 7950 3GB, which uses a 28 nm design. ATi has clocked the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this card. It features 1792 SPUs along with 112 TAUs and 32 ROPs.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have the exact same bandwidth, so in theory they should perform the same. (explain)
Texel Rate
Both cards have exactly the same texel fill rate, so in theory they should perform equally good at at AF. (explain)Pixel Rate
Both cards have exactly the same pixel fill rate, so in theory they should perform equally good at at FSAA, and be able to handle the same screen resolutions. (explain)
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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Radeon HD 7950Amazon.com
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Radeon HD 7950 3GBAmazon.com
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Specifications
| Model | Radeon HD 7950 | Radeon HD 7950 3GB |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | January 2012 | January 2012 |
| Code Name | Tahiti Pro | Tahiti Pro |
| Fab Process | 28 nm | 28 nm |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Memory | 1536 MB | 3072 MB |
| Core Speed | 800 MHz | 800 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1250 MHz (5000 MHz effective) | 1250 MHz (5000 MHz effective) |
| Unified Shaders | 1792 | 1792 |
| Texture Mapping Units | 112 | 112 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 384-bit | 384-bit |
| DirectX Version | DirectX 11.1 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.2 |
| Power (Max TDP) | 200 watts | 200 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 240000 MB/sec | 240000 MB/sec |
| Texel Rate | 89600 Mtexels/sec | 89600 Mtexels/sec |
| Pixel Rate | 25600 Mpixels/sec | 25600 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 number of pixels that the graphics chip can possibly write to its local memory per 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 - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few 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.
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Comments
2 Responses to “Radeon HD 7950 vs Radeon HD 7950 3GB”there is an error...
there are 2 same VGA : 7950hd and 7950hd 3gb, but there is only the 7950hd 3gb...
THIS IS SPARTA
The Radeon HD 7950 (1.5GB) is due for release in march, the specifications are not a secret.