GeForce 940M vs Radeon R9 280

Intro

Compare those specs to the Radeon R9 280, which has a clock frequency of 933 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit bus, and makes use of a 28 nm design. It is made up 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 280		7961 points
GeForce 940M		1740 points
	Difference: 6221 (358%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 280 should theoretically be a lot superior to the GeForce 940M overall. (explain)

Radeon R9 280		240000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 224000 (1400%)

Texel Rate

The Radeon R9 280 will be much (about 306%) more effective at texture filtering than the GeForce 940M. (explain)

Radeon R9 280		104496 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 78768 (306%)

Pixel Rate

The Radeon R9 280 will be much (more or less 248%) faster with regards to AA than the GeForce 940M, and capable of handling higher resolutions while still performing well. (explain)

Radeon R9 280		29856 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 21280 (248%)

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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units by the core 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 the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.