Radeon HD 5450 vs Radeon HD 5570

Intro

Compare those specifications to the Radeon HD 5570, which makes use of a 40 nm design. AMD has set the core speed at 650 MHz. The DDR3 memory is set to run at a frequency of 900 MHz on this specific model. It features 400(80x5) SPUs as well as 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 5570		43 Watts
	Difference: 24 Watts (126%)

Memory Bandwidth

In theory, the Radeon HD 5570 should be 125% faster than the Radeon HD 5450 in general, due to its higher bandwidth. (explain)

Radeon HD 5570		28800 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 16000 (125%)

Texel Rate

The Radeon HD 5570 will be quite a bit (approximately 150%) faster with regards to anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 5570		13000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 7800 (150%)

Pixel Rate

The Radeon HD 5570 should be a lot (more or less 100%) more effective at anti-aliasing than the Radeon HD 5450, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 5570		5200 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 2600 (100%)

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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video 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 maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.