GeForce 940M vs Geforce GTX 680

Intro

Compare all that to the Geforce GTX 680, which has core clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

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 680		7650 points
GeForce 940M		1740 points
	Difference: 5910 (340%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Geforce GTX 680 should be 1102% faster than the GeForce 940M in general, because of its greater bandwidth. (explain)

Geforce GTX 680		192256 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 176256 (1102%)

Texel Rate

The Geforce GTX 680 is quite a bit (more or less 400%) better at anisotropic filtering than the GeForce 940M. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 103040 (400%)

Pixel Rate

The Geforce GTX 680 will be quite a bit (more or less 275%) faster with regards to full screen anti-aliasing than the GeForce 940M, and also capable of handling higher screen resolutions better. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 23616 (275%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.