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Radeon HD 3850 256MB vs Radeon HD 5830

Intro

The Radeon HD 3850 256MB has a clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 5830, which features core speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1120(224x5) SPUs as well as 56 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 256MB 75 Watts
Radeon HD 5830 175 Watts
Difference: 100 Watts (133%)

Memory Bandwidth

The Radeon HD 5830 should in theory perform much faster than the Radeon HD 3850 256MB in general. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 3850 256MB 52992 MB/sec
Difference: 75008 (142%)

Texel Rate

The Radeon HD 5830 will be a lot (more or less 319%) faster with regards to anisotropic filtering than the Radeon HD 3850 256MB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 3850 256MB 10688 Mtexels/sec
Difference: 34112 (319%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5830 is a better choice, though not by far. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 3850 256MB 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 256MB

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 256MB Radeon HD 5830
Manufacturer AMD AMD
Year Nov 19, 2007 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 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 max amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 ability to get to the maximum fill rate.

Display Prices

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Radeon HD 3850 256MB

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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