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Radeon HD 6850 vs Radeon HD 6950 2GB


Intro

The Radeon HD 6850 makes use of a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific model. It features 960 SPUs along with 48 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific model. It features 1408 SPUs along with 88 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 73 Watts (57%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 2GB should in theory be much superior to the Radeon HD 6850 overall. (explain)

Radeon HD 6950 2GB 160000 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The Radeon HD 6950 2GB is much (more or less 89%) more effective at anisotropic filtering than the Radeon HD 6850. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 33200 (89%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6950 2GB is superior to the Radeon HD 6850, but not by far. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 800 (3%)

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

Radeon HD 6850

Radeon HD 6950 2GB

Specifications

Display Specifications

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Model Radeon HD 6850 Radeon HD 6950 2GB
Manufacturer AMD AMD
Year October 2010 December 2010
Code Name Barts Pro Cayman Pro
Memory 1024 MB 2048 MB
Core Speed 775 MHz 800 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 127 watts 200 watts
Bandwidth 128000 MB/sec 160000 MB/sec
Texel Rate 37200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 24800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 960 1408
Texture Mapping Units 48 88
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1700 million 2640 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Radeon HD 6850

Radeon HD 6950 2GB

Comments

One Response to “Radeon HD 6850 vs Radeon HD 6950 2GB”
Het grote Game-Noob Topic - Pagina 69 - Bodynet.nl - Bodybuilding & Fitness discussieforums says:

[...] Radeon HD 6850 vs Radeon HD 6950 2GB – Performance Comparison Benchmarks @ Hardware Compare afgaande van de tests zou ik voor de 6950 gaan. Maar je al je hardware in rekening nemen en weten of je voeding goed genoeg is er voor. dat zou op zich geen al te groot probleem zijn. verder als de prijs inderdaad maar 30 euro verschilt tussen de kaarten en het nog steeds in de je budget past de 6950 nemen. __________________ Nu: SQ 1x220kg - BP 1x150kg - DL 1x215kg - MP 1x100kg Doel eind 2011: SQ 1x280kg - BP 1x180kg - DL 1x280kg - MP 1x130kg [...]

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