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Radeon HD 5830 vs Radeon HD 5870

Intro

The Radeon HD 5830 comes with a GPU core clock speed of 800 MHz, and the 1024 MB of GDDR5 memory is set to run at 1000 MHz through a 256-bit bus. It also is made up of 1120(224x5) SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 5870, which comes with a core clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It features 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830 175 Watts
Radeon HD 5870 188 Watts
Difference: 13 Watts (7%)

Memory Bandwidth

In theory, the Radeon HD 5870 is 20% faster than the Radeon HD 5830 in general, due to its greater bandwidth. (explain)

Radeon HD 5870 153600 MB/sec
Radeon HD 5830 128000 MB/sec
Difference: 25600 (20%)

Texel Rate

The Radeon HD 5870 is much (approximately 52%) better at AF than the Radeon HD 5830. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon HD 5830 44800 Mtexels/sec
Difference: 23200 (52%)

Pixel Rate

The Radeon HD 5870 should be quite a bit (more or less 113%) more effective at anti-aliasing than the Radeon HD 5830, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 14400 (113%)

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

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Radeon HD 5870

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 5830 Radeon HD 5870
Manufacturer AMD AMD
Year February 25, 2010 September 23, 2009
Code Name Cypress LE Cypress XT
Memory 1024 MB 1024 MB
Core Speed 800 MHz 850 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 175 watts 188 watts
Bandwidth 128000 MB/sec 153600 MB/sec
Texel Rate 44800 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 12800 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1120(224x5) 1600(320x5)
Texture Mapping Units 56 80
Render Output Units 16 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 maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 can be applied per second. This number is worked out by multiplying the total amount of texture units 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 5830

Amazon.com

Check prices at:

Radeon HD 5870

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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