GeForce 820M vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which features a GPU core clock speed of 725 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is comprised of 720 SPUs, 36 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 71 Watts (473%)

Memory Bandwidth

The Radeon HD 6750 1GB should in theory be quite a bit faster than the GeForce 820M in general. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 48000 (300%)

Texel Rate

The Radeon HD 6750 1GB is much (about 127%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 14596 (127%)

Pixel Rate

The Radeon HD 6750 1GB should be much (about 303%) more effective at full screen anti-aliasing than the GeForce 820M, and also able to handle higher screen resolutions better. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 8724 (303%)

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 moved past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.