GeForce 940M vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which has GPU core speed of 863 MHz, and 3072 MB of GDDR5 memory set to run at 1502 MHz through a 384-bit bus. It also is made up of 2304 SPUs, 192 TAUs, and 48 Raster Operation 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 780		10082 points
GeForce 940M		1740 points
	Difference: 8342 (479%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 is 1702% faster than the GeForce 940M overall, because of its greater data rate. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 272384 (1702%)

Texel Rate

The Geforce GTX 780 will be much (about 544%) better at AF than the GeForce 940M. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 139968 (544%)

Pixel Rate

The Geforce GTX 780 should be quite a bit (more or less 383%) better at anti-aliasing than the GeForce 940M, and also should be able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 32848 (383%)

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 (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated 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 drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.