GeForce 940M vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which features GPU core speed of 918 MHz, and 2048 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 285		8500 points
GeForce 940M		1740 points
	Difference: 6760 (389%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 285 should in theory be quite a bit superior to the GeForce 940M overall. (explain)

Radeon R9 285		176000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 160000 (1000%)

Texel Rate

The Radeon R9 285 is much (approximately 300%) faster with regards to AF than the GeForce 940M. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 77088 (300%)

Pixel Rate

The Radeon R9 285 will be a lot (approximately 243%) better at AA than the GeForce 940M, and capable of handling higher resolutions more effectively. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 20800 (243%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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