GeForce 920M vs Radeon HD 4550 256MB

Intro

Compare that to the Radeon HD 4550 256MB, which uses a 55 nm design. AMD has set the core frequency at 600 MHz. The DDR3 memory runs at a speed of 800 MHz on this specific model. It features 80(16x5) SPUs along with 8 TAUs and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce 920M should be a small bit faster than the Radeon HD 4550 256MB in general. (explain)

GeForce 920M		14400 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 920M will be much (about 536%) more effective at texture filtering than the Radeon HD 4550 256MB. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 25728 (536%)

Pixel Rate

The GeForce 920M should be much (more or less 218%) faster with regards to anti-aliasing than the Radeon HD 4550 256MB, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce 920M		7632 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 5232 (218%)

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 (measured in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.