GeForce 940M vs Radeon HD 6950 2GB

Intro

Compare those specifications to the Radeon HD 6950 2GB, which features a GPU core clock speed of 800 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also features 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 6950 2GB should in theory be much better than the GeForce 940M overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 144000 (900%)

Texel Rate

The Radeon HD 6950 2GB should be a lot (more or less 174%) more effective at AF than the GeForce 940M. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 44672 (174%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6950 2GB is a better choice, by far. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 17024 (199%)

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 maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.