GeForce 920M vs Radeon HD 5570

Intro

Compare those specifications to the Radeon HD 5570, which has GPU clock speed of 650 MHz, and 512 MB of DDR3 memory set to run at 900 MHz through a 128-bit bus. It also features 400(80x5) Stream Processors, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 5570 should be a lot faster than the GeForce 920M overall. (explain)

Radeon HD 5570		28800 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 14400 (100%)

Texel Rate

The GeForce 920M is much (about 135%) better at AF than the Radeon HD 5570. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 17528 (135%)

Pixel Rate

The GeForce 920M should be much (more or less 47%) better at anti-aliasing than the Radeon HD 5570, and should be able to handle higher resolutions more effectively. (explain)

GeForce 920M		7632 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 2432 (47%)

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 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 interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.