GeForce GTX 660 Ti vs GeForce GTX 870M

Intro

Compare those specifications to the GeForce GTX 870M, which comes with a GPU core clock speed of 941 MHz, and 3072 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also features 1344 SPUs, 112 TAUs, and 24 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 Ti		6013 points
GeForce GTX 870M		4770 points
	Difference: 1243 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 40 Watts (36%)

Memory Bandwidth

The GeForce GTX 660 Ti should theoretically perform a lot faster than the GeForce GTX 870M overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 48000 (50%)

Texel Rate

The GeForce GTX 870M should be a small bit (more or less 3%) more effective at anisotropic filtering than the GeForce GTX 660 Ti. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 2912 (3%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 870M is a better choice, though only just barely. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 624 (3%)

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 max amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.