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Radeon HD 6850 vs Radeon HD 6950 2GB

Intro

The Radeon HD 6850 comes with a core clock frequency of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is made up of 960 SPUs, 48 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which features core speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

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

Theoretically speaking, the Radeon HD 6950 2GB should perform much faster than the Radeon HD 6850 in general. (explain)

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

Texel Rate

The Radeon HD 6950 2GB will be much (approximately 89%) more effective at AF 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 a high screen resolution is important to you, then the Radeon HD 6950 2GB is a better choice, though 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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better 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 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 worked out by multiplying the number of Render Output Units 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to 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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