Radeon HD 4670 512MB vs Radeon HD 5830

Intro

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

Theoretically speaking, the Radeon HD 5830 will be 300% faster than the Radeon HD 4670 512MB in general, due to its greater bandwidth. (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 a lot (approximately 87%) more effective at texture filtering 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 is a lot (more or less 113%) better at anti-aliasing than the Radeon HD 4670 512MB, and 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 max amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card 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 the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.