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Radeon HD 5830 vs Radeon HD 7850

Intro

The Radeon HD 5830 comes with a clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is made up of 1120(224x5) SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 7850, which comes with GPU core speed of 860 MHz, and 2048 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also is made up of 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon HD 5830 175 Watts
Difference: 45 Watts (35%)

Memory Bandwidth

In theory, the Radeon HD 7850 should be just a bit faster than the Radeon HD 5830 in general. (explain)

Radeon HD 7850 153600 MB/sec
Radeon HD 5830 128000 MB/sec
Difference: 25600 (20%)

Texel Rate

The Radeon HD 7850 will be a lot (about 23%) faster with regards to AF than the Radeon HD 5830. (explain)

Radeon HD 7850 55040 Mtexels/sec
Radeon HD 5830 44800 Mtexels/sec
Difference: 10240 (23%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7850 is a better choice, by far. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 14720 (115%)

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

Amazon.com

Check prices at:

Radeon HD 7850

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 5830 Radeon HD 7850
Manufacturer AMD AMD
Year February 25, 2010 March 2012
Code Name Cypress LE Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 800 MHz 860 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 175 watts 130 watts
Bandwidth 128000 MB/sec 153600 MB/sec
Texel Rate 44800 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 12800 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 1120(224x5) 1024
Texture Mapping Units 56 64
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2154 million 2800 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock 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 graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 5830

Amazon.com

Check prices at:

Radeon HD 7850

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.

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