Radeon HD 4830 512MB vs Radeon HD 5830

Intro

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

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

Performance-wise, the Radeon HD 5830 should theoretically be quite a bit superior to the Radeon HD 4830 512MB in general. (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 quite a bit (approximately 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

If running with high levels of AA is important to you, then the Radeon HD 5830 is superior to the Radeon HD 4830 512MB, by far. (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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.