GeForce GTX 880M vs Radeon HD 4550 512MB

Intro

Compare that to the Radeon HD 4550 512MB, which uses a 55 nm design. AMD has set the core frequency at 600 MHz. The GDDR3 memory works at a frequency of 800 MHz on this specific model. It features 80(16x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
GeForce GTX 880M		130 Watts
	Difference: 105 Watts (420%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M should be 900% quicker than the Radeon HD 4550 512MB in general, because of its greater bandwidth. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 115200 (900%)

Texel Rate

The GeForce GTX 880M is quite a bit (more or less 2444%) faster with regards to texture filtering than the Radeon HD 4550 512MB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 117312 (2444%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 880M is superior to the Radeon HD 4550 512MB, by a large margin. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 28128 (1172%)

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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 can be processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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 reach the maximum fill rate.