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Radeon HD 6790 vs Radeon HD 6850

Intro

The Radeon HD 6790 features a clock frequency of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It features 800 SPUs, 40 TAUs, and 16 ROPs.

Compare those specifications to the Radeon HD 6850, which comes with a core clock speed of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 960 SPUs, 48 Texture Address Units, and 32 ROPs.

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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

The Radeon HD 6790, in theory, should be a small bit faster than the Radeon HD 6850 in general. (explain)

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

Texel Rate

The Radeon HD 6850 will be just a bit (more or less 11%) better at 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 a high resolution is important to you, then the Radeon HD 6850 is a better choice, by far. (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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that are applied per 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 higher 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 number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max 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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