GeForce 940M vs GeForce GTX 980

Intro

Compare those specifications to the GeForce GTX 980, which makes use of a 28 nm design. nVidia has clocked the core frequency at 1126 MHz. The GDDR5 memory works at a frequency of 1750 MHz on this particular card. It features 2048 SPUs along with 128 TAUs and 64 Rasterization Operator Units.

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

GeForce GTX 980		13552 points
GeForce 940M		1740 points
	Difference: 11812 (679%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 980 should perform much faster than the GeForce 940M in general. (explain)

GeForce GTX 980		224000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 208000 (1300%)

Texel Rate

The GeForce GTX 980 is a lot (about 460%) better at texture filtering than the GeForce 940M. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 118400 (460%)

Pixel Rate

The GeForce GTX 980 will be much (about 740%) more effective at AA than the GeForce 940M, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 63488 (740%)

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 data (counted in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.