GeForce 920M vs GeForce GTX 660

Intro

Compare those specs to the GeForce GTX 660, which features a core clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 192-bit memory bus, and uses a 28 nm design. It is comprised of 960 SPUs, 80 Texture Address Units, and 24 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 660		5063 points
GeForce 920M		1180 points
	Difference: 3883 (329%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 will be 901% faster than the GeForce 920M in general, due to its greater bandwidth. (explain)

GeForce GTX 660		144192 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 129792 (901%)

Texel Rate

The GeForce GTX 660 will be quite a bit (about 157%) better at AF than the GeForce 920M. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 47872 (157%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 660 is superior to the GeForce 920M, by a large margin. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 15888 (208%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 are applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics 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 could possibly write 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 the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.