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Radeon HD 6790 vs Radeon HD 6850

Intro

The Radeon HD 6790 has clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6850, which comes with core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs along with 48 TAUs and 32 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6850 2395 points
Radeon HD 6790 2150 points
Difference: 245 (11%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Radeon HD 6790 150 Watts
Difference: 23 Watts (18%)

Memory Bandwidth

Performance-wise, the Radeon HD 6790 should in theory be a small bit better than the Radeon HD 6850 overall. (explain)

Radeon HD 6790 134400 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 6400 (5%)

Texel Rate

The Radeon HD 6850 is a little bit (approximately 11%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

Radeon HD 6850 37200 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 3600 (11%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6850 is the winner, and very much so. (explain)

Radeon HD 6850 24800 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 11360 (85%)

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 6790

Amazon.com

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Radeon HD 6850

Amazon.com

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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 6790 Radeon HD 6850
Manufacturer AMD AMD
Year April 2011 October 2010
Code Name Barts LE Barts Pro
Memory 1024 MB 1024 MB
Core Speed 840 MHz 775 MHz
Memory Speed 4200 MHz 4000 MHz
Power (Max TDP) 150 watts 127 watts
Bandwidth 134400 MB/sec 128000 MB/sec
Texel Rate 33600 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 13440 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 800 960
Texture Mapping Units 40 48
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1700 million 1700 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 6790

Amazon.com

Check prices at:

Radeon HD 6850

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

4 Responses to “Radeon HD 6790 vs Radeon HD 6850”
Placa video buget 550lei - My Garage says:

[...] 6850 este un pic mai performanta si are cosumul ceva mai mic. Uite aici un grafic comparativ: http://www.hwcompare.com/9995/radeon...adeon-hd-6850/ __________________ Fara obiective nu exista [...]

Vuestra Opinion sobre PC piezas - Foros de Informatica - Foro de Windows 7, Foro de ayuda, Noticias de Informatica, Windows 7 y Windows Vista says:

[...] [...]

Where to buy.. or Looking For..? inquires - Post here - Page 374 says:

[...] price is around 6k. Better performance with other same price level pero dako ug power consumption. Radeon HD 6790 vs Radeon HD 6850 – Performance Comparison Benchmarks @ Hardware Compare but if you like balance try HD 7770 DDR5. Reply With Quote + Reply [...]

Denzyl says:

Which is better for Crysis 2?ati hd 6850 or 6790?

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