GeForce 940M vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which features GPU core speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M395X, in theory, should be quite a bit faster than the GeForce 940M overall. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 144000 (900%)

Texel Rate

The Radeon R9 M395X is much (approximately 260%) faster with regards to texture filtering than the GeForce 940M. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 66816 (260%)

Pixel Rate

The Radeon R9 M395X will be a lot (more or less 170%) faster with regards to anti-aliasing than the GeForce 940M, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 14560 (170%)

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 information (counted in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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