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GeForce 9400 GT 256MB vs Radeon HD 6950 2GB
Intro
The GeForce 9400 GT 256MB comes with a core clock frequency of 550 MHz and a GDDR2 memory speed of 400 MHz. It also uses a 128-bit memory bus, and makes use of a 65 nm design. It is made up of 16 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.Compare all of that to the Radeon HD 6950 2GB, which comes with GPU clock speed of 800 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is comprised of 1408 Stream Processors, 88 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce 9400 GT 256MB |
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50 Watts |
| Radeon HD 6950 2GB |
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200 Watts |
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Memory Bandwidth
The Radeon HD 6950 2GB should theoretically perform quite a bit faster than the GeForce 9400 GT 256MB overall. (explain)
| Radeon HD 6950 2GB |
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160000 MB/sec |
| GeForce 9400 GT 256MB |
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12800 MB/sec |
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Texel Rate
The Radeon HD 6950 2GB is quite a bit (approximately 1500%) faster with regards to AF than the GeForce 9400 GT 256MB. (explain)| Radeon HD 6950 2GB |
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70400 Mtexels/sec |
| GeForce 9400 GT 256MB |
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4400 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 6950 2GB is a better choice, and very much so. (explain)| Radeon HD 6950 2GB |
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25600 Mpixels/sec |
| GeForce 9400 GT 256MB |
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2200 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
GeForce 9400 GT 256MBAmazon.com
Check prices at:
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Radeon HD 6950 2GBAmazon.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 | GeForce 9400 GT 256MB | Radeon HD 6950 2GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | August 2008 | December 2010 |
| Code Name | G96a | Cayman Pro |
| Memory | 256 MB | 2048 MB |
| Core Speed | 550 MHz | 800 MHz |
| Memory Speed | 800 MHz | 5000 MHz |
| Power (Max TDP) | 50 watts | 200 watts |
| Bandwidth | 12800 MB/sec | 160000 MB/sec |
| Texel Rate | 4400 Mtexels/sec | 70400 Mtexels/sec |
| Pixel Rate | 2200 Mpixels/sec | 25600 Mpixels/sec |
| Unified Shaders | 16 | 1408 |
| Texture Mapping Units | 8 | 88 |
| Render Output Units | 4 | 32 |
| Bus Type | GDDR2 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 65 nm | 40 nm |
| Transistors | 314 million | 2640 million |
| Bus | PCIe x16 2.0, PCI | PCIe x16 |
| DirectX Version | DirectX 10 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.
GeForce 9400 GT 256MBAmazon.com
Check prices at:
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Radeon HD 6950 2GBAmazon.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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