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Radeon HD 4850 512MB vs Radeon HD 5830

Intro

The Radeon HD 4850 512MB features a GPU clock speed of 625 MHz, and the 512 MB of GDDR3 RAM runs at 993 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

Compare those specs to the Radeon HD 5830, which features a clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is comprised of 1120(224x5) SPUs, 56 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB 110 Watts
Radeon HD 5830 175 Watts
Difference: 65 Watts (59%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should be quite a bit faster than the Radeon HD 4850 512MB in general. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 64448 (101%)

Texel Rate

The Radeon HD 5830 is quite a bit (more or less 79%) faster with regards to AF than the Radeon HD 4850 512MB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 19800 (79%)

Pixel Rate

The Radeon HD 5830 will be a lot (about 28%) faster with regards to AA than the Radeon HD 4850 512MB, and should be able to handle higher resolutions more effectively. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 4850 512MB 10000 Mpixels/sec
Difference: 2800 (28%)

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 4850 512MB

Amazon.com

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Radeon HD 5830

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 4850 512MB Radeon HD 5830
Manufacturer AMD AMD
Year Jun 25, 2008 February 25, 2010
Code Name RV770 PRO Cypress LE
Memory 512 MB 1024 MB
Core Speed 625 MHz 800 MHz
Memory Speed 1986 MHz 4000 MHz
Power (Max TDP) 110 watts 175 watts
Bandwidth 63552 MB/sec 128000 MB/sec
Texel Rate 25000 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800(160x5) 1120(224x5)
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 956 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 data (counted in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock 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 maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 4850 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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