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Radeon HD 5850 vs Radeon HD 6790

Intro

The Radeon HD 5850 features clock speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1440(288x5) SPUs along with 72 TAUs and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 6790, which has GPU core speed of 840 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 256-bit bus. It also features 800 Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790 150 Watts
Radeon HD 5850 151 Watts
Difference: 1 Watts (1%)

Memory Bandwidth

The Radeon HD 6790 should in theory perform a bit faster than the Radeon HD 5850 overall. (explain)

Radeon HD 6790 134400 MB/sec
Radeon HD 5850 128000 MB/sec
Difference: 6400 (5%)

Texel Rate

The Radeon HD 5850 is quite a bit (approximately 55%) faster with regards to AF than the Radeon HD 6790. (explain)

Radeon HD 5850 52200 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 18600 (55%)

Pixel Rate

The Radeon HD 5850 is quite a bit (approximately 73%) more effective at anti-aliasing than the Radeon HD 6790, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 5850 23200 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 9760 (73%)

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 5850

Amazon.com

Check prices at:

Radeon HD 6790

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 5850 Radeon HD 6790
Manufacturer AMD AMD
Year September 30, 2009 April 2011
Code Name Cypress PRO Barts LE
Memory 1024 MB 1024 MB
Core Speed 725 MHz 840 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 151 watts 150 watts
Bandwidth 128000 MB/sec 134400 MB/sec
Texel Rate 52200 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 23200 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 1440(288x5) 800
Texture Mapping Units 72 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 2154 million 1700 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units of the card 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 one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few 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.

Display Prices

Hide Prices

Radeon HD 5850

Amazon.com

Check prices at:

Radeon HD 6790

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 5850 vs Radeon HD 6790”
hd 6790 o hd 5850 - APPInformatica.com says:

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