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Radeon HD 5850 vs Radeon HD 5870


The Radeon HD 5850 features core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1440(288x5) SPUs as well as 72 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 5870, which has core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 1600(320x5) SPUs as well as 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5850 151 Watts
Radeon HD 5870 188 Watts
Difference: 37 Watts (25%)

Memory Bandwidth

The Radeon HD 5870 should theoretically perform a little bit faster than the Radeon HD 5850 overall. (explain)

Radeon HD 5870 153600 MB/sec
Radeon HD 5850 128000 MB/sec
Difference: 25600 (20%)

Texel Rate

The Radeon HD 5870 is a lot (more or less 30%) faster with regards to anisotropic filtering than the Radeon HD 5850. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon HD 5850 52200 Mtexels/sec
Difference: 15800 (30%)

Pixel Rate

The Radeon HD 5870 should be a bit (about 17%) faster with regards to FSAA than the Radeon HD 5850, and will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon HD 5850 23200 Mpixels/sec
Difference: 4000 (17%)

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

Radeon HD 5870

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 5850 Radeon HD 5870
Manufacturer AMD AMD
Year September 30, 2009 September 23, 2009
Code Name Cypress PRO Cypress XT
Memory 1024 MB 1024 MB
Core Speed 725 MHz 850 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 151 watts 188 watts
Bandwidth 128000 MB/sec 153600 MB/sec
Texel Rate 52200 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 23200 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1440(288x5) 1600(320x5)
Texture Mapping Units 72 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 2154 million 2154 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.


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