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Radeon HD 5830 vs Radeon HD 6850


The Radeon HD 5830 features clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1120(224x5) SPUs along with 56 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 6850, which features core clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs along with 48 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 5830 175 Watts
Difference: 48 Watts (38%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The Radeon HD 5830 should be a small bit (more or less 20%) faster with regards to texture filtering than the Radeon HD 6850. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 7600 (20%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6850 is a better choice, by a large margin. (explain)

Radeon HD 6850 24800 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 12000 (94%)

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 5830

Radeon HD 6850

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.


Display Specifications

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Model Radeon HD 5830 Radeon HD 6850
Manufacturer AMD AMD
Year February 25, 2010 October 2010
Code Name Cypress LE Barts Pro
Memory 1024 MB 1024 MB
Core Speed 800 MHz 775 MHz
Memory Speed 4000 MHz 4000 MHz
Power (Max TDP) 175 watts 127 watts
Bandwidth 128000 MB/sec 128000 MB/sec
Texel Rate 44800 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 12800 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 1120(224x5) 960
Texture Mapping Units 56 48
Render Output Units 16 32
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 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video 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 write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.


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