GeForce 820M vs Radeon HD 5750 1GB

Intro

Compare all that to the Radeon HD 5750 1GB, which features clock speeds of 700 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 memory. It features 720(144x5) SPUs along with 36 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon HD 5750 1GB		86 Watts
	Difference: 71 Watts (473%)

Memory Bandwidth

In theory, the Radeon HD 5750 1GB should perform a lot faster than the GeForce 820M overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 57600 (360%)

Texel Rate

The Radeon HD 5750 1GB will be quite a bit (approximately 119%) more effective at anisotropic filtering than the GeForce 820M. (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 13696 (119%)

Pixel Rate

The Radeon HD 5750 1GB should be much (approximately 289%) better at AA than the GeForce 820M, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 5750 1GB		11200 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 8324 (289%)

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 max amount of data (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs 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 memory bandwidth is, the lower the ability to reach the maximum fill rate.