GeForce 940M vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which has GPU core speed of 900 MHz, and 4096 MB of GDDR5 memory running at 1375 MHz through a 128-bit bus. It also features 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M280X should be quite a bit faster than the GeForce 940M in general. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 72000 (450%)

Texel Rate

The Radeon R9 M280X is quite a bit (approximately 96%) faster with regards to anisotropic filtering than the GeForce 940M. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 24672 (96%)

Pixel Rate

The Radeon R9 M280X should be much (more or less 68%) better at anti-aliasing than the GeForce 940M, and also should be capable of handling higher resolutions better. (explain)

Radeon R9 M280X		14400 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 5824 (68%)

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 megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that can be applied 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.