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Radeon HD 6950 2GB vs Radeon R5 M255

Intro

The Radeon HD 6950 2GB features a GPU clock speed of 800 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1250 MHz through a 256-bit bus. It also is comprised of 1408 SPUs, 88 TAUs, and 32 ROPs.

Compare those specifications to the Radeon R5 M255, which comes with core speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6950 2GB should theoretically be a lot faster than the Radeon R5 M255 overall. (explain)

Radeon HD 6950 2GB 160000 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 144000 (900%)

Texel Rate

The Radeon HD 6950 2GB should be a lot (about 274%) better at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 51600 (274%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6950 2GB is superior to the Radeon R5 M255, and very much so. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 18080 (240%)

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

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Radeon HD 6950 2GB

Amazon.com

Check prices at:

Radeon R5 M255

Amazon.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.

Specifications

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Model Radeon HD 6950 2GB Radeon R5 M255
Manufacturer AMD AMD
Year December 2010 June 2014
Code Name Cayman Pro Jet Pro
Memory 2048 MB 2048 MB
Core Speed 800 MHz 940 MHz
Memory Speed 5000 MHz 2000 MHz
Power (Max TDP) 200 watts (Unknown) watts
Bandwidth 160000 MB/sec 16000 MB/sec
Texel Rate 70400 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 1408 320
Texture Mapping Units 88 20
Render Output Units 32 8
Bus Type GDDR5 DDR3
Bus Width 256-bit 64-bit
Fab Process 40 nm 28 nm
Transistors 2640 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x8
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6950 2GB

Amazon.com

Check prices at:

Radeon R5 M255

Amazon.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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