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Radeon HD 3690/3830 vs Radeon HD 5830

Intro

The Radeon HD 3690/3830 features a core clock frequency of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Compare that to the Radeon HD 5830, which has GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also is comprised of 1120(224x5) SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830 75 Watts
Radeon HD 5830 175 Watts
Difference: 100 Watts (133%)

Memory Bandwidth

The Radeon HD 5830 should in theory be much faster than the Radeon HD 3690/3830 in general. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 3690/3830 26496 MB/sec
Difference: 101504 (383%)

Texel Rate

The Radeon HD 5830 will be much (about 319%) better at AF than the Radeon HD 3690/3830. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 34112 (319%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5830 is a better choice, but not by far. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 3690/3830 10688 Mpixels/sec
Difference: 2112 (20%)

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 3690/3830

Amazon.com

Check prices at:

Radeon HD 5830

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 3690/3830 Radeon HD 5830
Manufacturer AMD AMD
Year 2008 February 25, 2010
Code Name RV670 PRO Cypress LE
Memory 256 MB 1024 MB
Core Speed 668 MHz 800 MHz
Memory Speed 1656 MHz 4000 MHz
Power (Max TDP) 75 watts 175 watts
Bandwidth 26496 MB/sec 128000 MB/sec
Texel Rate 10688 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 320(64x5) 1120(224x5)
Texture Mapping Units 16 56
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 2154 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 3690/3830

Amazon.com

Check prices at:

Radeon HD 5830

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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