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Radeon HD 4830 512MB vs Radeon HD 5830

Intro

The Radeon HD 4830 512MB has a clock frequency of 575 MHz and a GDDR3 memory speed of 900 MHz. It also features a 256-bit bus, and uses a 55 nm design. It features 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Compare all that to the Radeon HD 5830, which makes use of a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this specific model. It features 1120(224x5) SPUs along with 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
Radeon HD 5830 175 Watts
Difference: 80 Watts (84%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should be 122% faster than the Radeon HD 4830 512MB overall, because of its higher data rate. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 70400 (122%)

Texel Rate

The Radeon HD 5830 will be a lot (approximately 143%) faster with regards to anisotropic filtering than the Radeon HD 4830 512MB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 26400 (143%)

Pixel Rate

The Radeon HD 5830 is much (approximately 39%) more effective at AA than the Radeon HD 4830 512MB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 3600 (39%)

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 4830 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 4830 512MB Radeon HD 5830
Manufacturer AMD AMD
Year Oct 21, 2008 February 25, 2010
Code Name RV770 LE Cypress LE
Memory 512 MB 1024 MB
Core Speed 575 MHz 800 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 95 watts 175 watts
Bandwidth 57600 MB/sec 128000 MB/sec
Texel Rate 18400 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 640(128x5) 1120(224x5)
Texture Mapping Units 32 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: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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 - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4830 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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