GeForce 825M vs Radeon HD 4550 256MB

Intro

Compare those specs to the Radeon HD 4550 256MB, which features GPU core speed of 600 MHz, and 256 MB of DDR3 RAM set to run at 800 MHz through a 64-bit bus. It also features 80(16x5) SPUs, 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 256MB		25 Watts
GeForce 825M		33 Watts
	Difference: 8 Watts (32%)

Memory Bandwidth

Performance-wise, the GeForce 825M should theoretically be just a bit better than the Radeon HD 4550 256MB overall. (explain)

GeForce 825M		14400 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M should be quite a bit (more or less 183%) faster with regards to anisotropic filtering than the Radeon HD 4550 256MB. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 8800 (183%)

Pixel Rate

The GeForce 825M should be much (approximately 183%) faster with regards to AA than the Radeon HD 4550 256MB, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 4550 256MB		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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.