GeForce 940M vs Geforce GTX 670

Intro

Compare all that to the Geforce GTX 670, which has GPU clock speed of 915 MHz, and 2048 MB of GDDR5 memory running at 1500 MHz through a 256-bit bus. It also is made up of 1344 Stream Processors, 112 Texture Address Units, 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

Geforce GTX 670		7351 points
GeForce 940M		1740 points
	Difference: 5611 (322%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Geforce GTX 670 is 1100% quicker than the GeForce 940M overall, because of its higher bandwidth. (explain)

Geforce GTX 670		192000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 176000 (1100%)

Texel Rate

The Geforce GTX 670 should be a lot (about 298%) better at AF than the GeForce 940M. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 76752 (298%)

Pixel Rate

The Geforce GTX 670 is quite a bit (more or less 241%) better at anti-aliasing than the GeForce 940M, and also should be able to handle higher resolutions better. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 20704 (241%)

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 (counted in megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.