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Radeon HD 6950 2GB vs Radeon HD 7850

Intro

The Radeon HD 6950 2GB uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this particular model. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

Compare that to the Radeon HD 7850, which uses a 28 nm design. AMD has clocked the core frequency at 860 MHz. The GDDR5 memory is set to run at a frequency of 1200 MHz on this card. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 70 Watts (54%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 2GB should perform just a bit faster than the Radeon HD 7850 in general. (explain)

Radeon HD 6950 2GB 160000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 6400 (4%)

Texel Rate

The Radeon HD 6950 2GB will be quite a bit (more or less 28%) better at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 15360 (28%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7850 is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 1920 (8%)

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 HD 7850

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 HD 7850
Manufacturer AMD AMD
Year December 2010 March 2012
Code Name Cayman Pro Pitcairn Pro
Memory 2048 MB 2048 MB
Core Speed 800 MHz 860 MHz
Memory Speed 5000 MHz 4800 MHz
Power (Max TDP) 200 watts 130 watts
Bandwidth 160000 MB/sec 153600 MB/sec
Texel Rate 70400 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 1408 1024
Texture Mapping Units 88 64
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 6950 2GB

Amazon.com

Check prices at:

Radeon HD 7850

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.

Comments

One Response to “Radeon HD 6950 2GB vs Radeon HD 7850”
Problema AMD 6950 (Glitch mai in orice joc) says:

[...] modelGigabyte Radeon HD 7850 OC WindForce 2GB DDR5 256-bi (GV-R785OC-2GD)Eu din cate am observat de aici ca este mai slab 7850 fata de 6950 2gb, ce pot face sa-mi dea banii inapoi daca nu poate sa imi dea [...]

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