Radeon HD 5550 vs Radeon HD 6570 (OEM) 2GB

Intro

Compare those specifications to the Radeon HD 6570 (OEM) 2GB, which uses a 40 nm design. AMD has clocked the core frequency at 650 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this specific model. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6570 (OEM) 2GB should in theory perform quite a bit faster than the Radeon HD 5550 overall. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB is much (more or less 77%) faster with regards to anisotropic filtering than the Radeon HD 5550. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 6800 (77%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB is just a bit (approximately 18%) better at anti-aliasing than the Radeon HD 5550, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 800 (18%)

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 information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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 calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on 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 ability to reach the max fill rate.