GeForce 920M vs Radeon HD 4550 512MB

Intro

Compare those specifications to the Radeon HD 4550 512MB, which comes with GPU clock speed of 600 MHz, and 512 MB of GDDR3 RAM running at 800 MHz through a 64-bit bus. It also is comprised of 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 920M is 13% quicker than the Radeon HD 4550 512MB overall, because of its greater data rate. (explain)

GeForce 920M		14400 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 920M is much (approximately 536%) better at texture filtering than the Radeon HD 4550 512MB. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 25728 (536%)

Pixel Rate

The GeForce 920M is a lot (approximately 218%) faster with regards to AA than the Radeon HD 4550 512MB, and also will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce 920M		7632 Mpixels/sec
Radeon HD 4550 512MB		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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock 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 quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.