GeForce 940M vs Radeon R9 M380

Intro

Compare that to the Radeon R9 M380, which comes with clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M380 will be 500% quicker than the GeForce 940M in general, due to its higher data rate. (explain)

Radeon R9 M380		96000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 80000 (500%)

Texel Rate

The Radeon R9 M380 is a lot (more or less 55%) more effective at anisotropic filtering than the GeForce 940M. (explain)

Radeon R9 M380		40000 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 14272 (55%)

Pixel Rate

The Radeon R9 M380 should be much (about 87%) more effective at FSAA than the GeForce 940M, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M380		16000 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 7424 (87%)

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 (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. 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 also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.