GeForce 825M vs Radeon HD 4550 512MB

Intro

Compare all of that to the Radeon HD 4550 512MB, which features core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 80(16x5) SPUs as well as 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 825M		33 Watts
	Difference: 8 Watts (32%)

Memory Bandwidth

Performance-wise, the GeForce 825M should in theory be just a bit better than the Radeon HD 4550 512MB in general. (explain)

GeForce 825M		14400 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M is quite a bit (approximately 183%) better at texture filtering than the Radeon HD 4550 512MB. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 8800 (183%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 825M is the winner, by a large margin. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 4400 (183%)

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 transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.