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Radeon HD 5850 vs Radeon HD 6950 2GB

Intro

The Radeon HD 5850 comes with a clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is comprised of 1440(288x5) SPUs, 72 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which comes with a GPU core 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 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5850 151 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 49 Watts (32%)

Memory Bandwidth

The Radeon HD 6950 2GB, in theory, should perform much faster than the Radeon HD 5850 in general. (explain)

Radeon HD 6950 2GB 160000 MB/sec
Radeon HD 5850 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The Radeon HD 6950 2GB should be much (about 35%) faster with regards to texture filtering than the Radeon HD 5850. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
Radeon HD 5850 52200 Mtexels/sec
Difference: 18200 (35%)

Pixel Rate

The Radeon HD 6950 2GB is a little bit (about 10%) more effective at anti-aliasing than the Radeon HD 5850, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
Radeon HD 5850 23200 Mpixels/sec
Difference: 2400 (10%)

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 5850

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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 5850 Radeon HD 6950 2GB
Manufacturer AMD AMD
Year September 30, 2009 December 2010
Code Name Cypress PRO Cayman Pro
Memory 1024 MB 2048 MB
Core Speed 725 MHz 800 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 151 watts 200 watts
Bandwidth 128000 MB/sec 160000 MB/sec
Texel Rate 52200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 23200 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1440(288x5) 1408
Texture Mapping Units 72 88
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 2154 million 2640 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5850

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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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