GeForce 940M vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which features a core clock frequency of 1100 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It features 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 M385X should theoretically perform quite a bit faster than the GeForce 940M in general. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 80000 (500%)

Texel Rate

The Radeon R9 M385X should be a lot (more or less 139%) more effective at texture filtering than the GeForce 940M. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 35872 (139%)

Pixel Rate

The Radeon R9 M385X is much (about 105%) better at AA than the GeForce 940M, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 9024 (105%)

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 data (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.