Radeon HD 5570 vs Radeon HD 5830

Intro

Compare those specifications to the Radeon HD 5830, which comes with a clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It features 1120(224x5) SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
Radeon HD 5830		175 Watts
	Difference: 132 Watts (307%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should perform quite a bit faster than the Radeon HD 5570 overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 99200 (344%)

Texel Rate

The Radeon HD 5830 should be much (more or less 245%) more effective at AF than the Radeon HD 5570. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 31800 (245%)

Pixel Rate

The Radeon HD 5830 is a lot (more or less 146%) more effective at anti-aliasing than the Radeon HD 5570, and will be able to handle higher resolutions better. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 7600 (146%)

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 maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.