GeForce GTX 660 Ti vs GeForce GTX 850M

Intro

Compare those specifications to the GeForce GTX 850M, which has a core clock frequency of 876 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 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 660 Ti		6013 points
GeForce GTX 850M		3340 points
	Difference: 2673 (80%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 110 Watts (275%)

Memory Bandwidth

The GeForce GTX 660 Ti should theoretically be a lot faster than the GeForce GTX 850M overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 112000 (350%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (more or less 192%) better at anisotropic filtering than the GeForce GTX 850M. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 67440 (192%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 850M, and very much so. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 7944 (57%)

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: Bandwidth is the largest amount of information (measured in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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