GeForce GTX 660 vs GeForce GTX 860M

Intro

Compare those specifications to the GeForce GTX 860M, which has a clock frequency of 797 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 1152 SPUs, 96 TAUs, and 16 Raster Operation Units.

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 660		5063 points
GeForce GTX 860M		4340 points
	Difference: 723 (17%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GTX 660		140 Watts
	Difference: 95 Watts (211%)

Memory Bandwidth

In theory, the GeForce GTX 660 should be quite a bit faster than the GeForce GTX 860M overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 80192 (125%)

Texel Rate

The GeForce GTX 660 should be a small bit (approximately 2%) faster with regards to anisotropic filtering than the GeForce GTX 860M. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 860M		76512 Mtexels/sec
	Difference: 1888 (2%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 660 is superior to the GeForce GTX 860M, by a large margin. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 10768 (84%)

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 data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses 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 high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.