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Radeon HD 6950 2GB vs Radeon R5 M255

Intro

The Radeon HD 6950 2GB makes use of a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this particular model. It features 1408 SPUs as well as 88 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon R5 M255, which comes with a clock speed of 940 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit memory bus, and uses a 28 nm design. It is made up of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 2GB should perform quite a bit faster than the Radeon R5 M255 in general. (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 (approximately 274%) faster with regards to 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 using high levels of AA 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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the 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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