GeForce 920M vs Radeon HD 4550 256MB

Intro

Compare those specs to the Radeon HD 4550 256MB, which features a core clock frequency of 600 MHz and a DDR3 memory frequency of 800 MHz. It also makes use of a 64-bit memory bus, and makes use of a 55 nm design. It is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

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

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

Texel Rate

The GeForce 920M will be a lot (more or less 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

If using a high screen resolution is important to you, then the GeForce 920M is superior to the Radeon HD 4550 256MB, and very much so. (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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that are processed in one 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 higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.