GeForce 820M vs Radeon HD 5750 512MB

Intro

Compare all that to the Radeon HD 5750 512MB, which comes with a GPU core clock speed of 700 MHz, and 512 MB of GDDR5 RAM set to run at 1150 MHz through a 128-bit bus. It also features 720(144x5) SPUs, 36 Texture Address Units, 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 512MB		86 Watts
	Difference: 71 Watts (473%)

Memory Bandwidth

Performance-wise, the Radeon HD 5750 512MB should theoretically be quite a bit better than the GeForce 820M in general. (explain)

Radeon HD 5750 512MB		73600 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 57600 (360%)

Texel Rate

The Radeon HD 5750 512MB will be quite a bit (about 119%) more effective at anisotropic filtering than the GeForce 820M. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 13696 (119%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5750 512MB is the winner, by far. (explain)

Radeon HD 5750 512MB		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 transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.