GeForce 940M vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which features a core clock frequency of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M280X should in theory perform quite a bit faster than the GeForce 940M overall. (explain)

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

Texel Rate

The Radeon R9 M280X will be quite a bit (approximately 96%) better at anisotropic filtering than the GeForce 940M. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 M280X is superior to the GeForce 940M, by far. (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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.