Radeon HD 4830 512MB vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which features a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also is made up of 1120(224x5) Stream Processors, 56 TAUs, and 16 ROPs.

Display Graphs

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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 a lot faster than the Radeon HD 4830 512MB overall. (explain)

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

Texel Rate

The Radeon HD 5830 should be quite a bit (more or less 143%) more effective at 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 will be a lot (about 39%) more effective at anti-aliasing than the Radeon HD 4830 512MB, and also will be able to handle higher resolutions better. (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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, 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 that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.