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Radeon HD 4830 1GB vs Radeon HD 5830

Intro

The Radeon HD 4830 1GB has a core clock frequency of 575 MHz and a GDDR4 memory speed of 900 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 5830, which has GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also features 1120(224x5) Stream Processors, 56 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB 95 Watts
Radeon HD 5830 175 Watts
Difference: 80 Watts (84%)

Memory Bandwidth

The Radeon HD 5830 should theoretically be a lot faster than the Radeon HD 4830 1GB overall. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4830 1GB 57600 MB/sec
Difference: 70400 (122%)

Texel Rate

The Radeon HD 5830 is a lot (about 143%) faster with regards to texture filtering than the Radeon HD 4830 1GB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4830 1GB 18400 Mtexels/sec
Difference: 26400 (143%)

Pixel Rate

The Radeon HD 5830 will be much (approximately 39%) faster with regards to full screen anti-aliasing than the Radeon HD 4830 1GB, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 4830 1GB 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 1GB

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 1GB Radeon HD 5830
Manufacturer AMD AMD
Year Oct 21, 2008 February 25, 2010
Code Name RV770 LE Cypress LE
Memory 1024 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 GDDR4 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 megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 max fill rate.

Display Prices

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Radeon HD 4830 1GB

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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