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Radeon HD 3850 512MB vs Radeon HD 5670

Intro

The Radeon HD 3850 512MB comes with core 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 ROPs.

Compare all that to the Radeon HD 5670, which has core clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 400(80x5) SPUs along with 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 3850 512MB 75 Watts
Difference: 14 Watts (23%)

Memory Bandwidth

The Radeon HD 5670, in theory, should be quite a bit faster than the Radeon HD 3850 512MB in general. (explain)

Radeon HD 5670 64000 MB/sec
Radeon HD 3850 512MB 52992 MB/sec
Difference: 11008 (21%)

Texel Rate

The Radeon HD 5670 will be quite a bit (approximately 45%) better at texture filtering than the Radeon HD 3850 512MB. (explain)

Radeon HD 5670 15500 Mtexels/sec
Radeon HD 3850 512MB 10688 Mtexels/sec
Difference: 4812 (45%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3850 512MB is the winner, by a large margin. (explain)

Radeon HD 3850 512MB 10688 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 4488 (72%)

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 5670

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 5670
Manufacturer AMD AMD
Year Nov 19, 2007 January 14, 2010
Code Name RV670 PRO Redwood XT
Memory 512 MB 1024 MB
Core Speed 668 MHz 775 MHz
Memory Speed 1656 MHz 4000 MHz
Power (Max TDP) 75 watts 61 watts
Bandwidth 52992 MB/sec 64000 MB/sec
Texel Rate 10688 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 320(64x5) 400(80x5)
Texture Mapping Units 16 20
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 627 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 largest amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are applied in one second. This 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 handling 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 video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the 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 5670

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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