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Radeon HD 3850 512MB vs Radeon HD 5830

Intro

The Radeon HD 3850 512MB has core clock speeds of 668 MHz on the GPU, and 828 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 5830, which uses a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this card. It features 1120(224x5) SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 512MB 75 Watts
Radeon HD 5830 175 Watts
Difference: 100 Watts (133%)

Memory Bandwidth

The Radeon HD 5830 should theoretically be much faster than the Radeon HD 3850 512MB in general. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 3850 512MB 52992 MB/sec
Difference: 75008 (142%)

Texel Rate

The Radeon HD 5830 should be quite a bit (approximately 319%) faster with regards to anisotropic filtering than the Radeon HD 3850 512MB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 3850 512MB 10688 Mtexels/sec
Difference: 34112 (319%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 5830 is a better choice, but only just. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 3850 512MB 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 3850 512MB

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 3850 512MB Radeon HD 5830
Manufacturer AMD AMD
Year Nov 19, 2007 February 25, 2010
Code Name RV670 PRO Cypress LE
Memory 512 MB 1024 MB
Core Speed 668 MHz 800 MHz
Memory Speed 1656 MHz 4000 MHz
Power (Max TDP) 75 watts 175 watts
Bandwidth 52992 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 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 2154 million
Bus PCIe 2.0 x16/AGP 8x PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the 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 clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3850 512MB

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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