Radeon HD 4670 512MB vs Radeon HD 5830

Intro

Compare all that to the Radeon HD 5830, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is comprised of 1120(224x5) Stream Processors, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon HD 5830		175 Watts
	Difference: 105 Watts (150%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5830 should theoretically be a lot better than the Radeon HD 4670 512MB in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 96000 (300%)

Texel Rate

The Radeon HD 5830 will be quite a bit (approximately 87%) faster with regards to AF than the Radeon HD 4670 512MB. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 20800 (87%)

Pixel Rate

The Radeon HD 5830 will be quite a bit (about 113%) faster with regards to AA than the Radeon HD 4670 512MB, and also should be able to handle higher screen resolutions better. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 6800 (113%)

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 data (counted in MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.