GeForce GTX 860M vs GeForce GTX 870M

Intro

Compare all of that to the GeForce GTX 870M, which has clock speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 memory. It features 1344 SPUs as well as 112 Texture Address Units and 24 Rasterization Operator 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 870M		4770 points
GeForce GTX 860M		4340 points
	Difference: 430 (10%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GTX 870M		110 Watts
	Difference: 65 Watts (144%)

Memory Bandwidth

The GeForce GTX 870M, in theory, should perform much faster than the GeForce GTX 860M in general. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The GeForce GTX 870M is quite a bit (approximately 38%) more effective at texture filtering than the GeForce GTX 860M. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 860M		76512 Mtexels/sec
	Difference: 28880 (38%)

Pixel Rate

The GeForce GTX 870M should be a lot (about 77%) more effective at full screen anti-aliasing than the GeForce GTX 860M, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 9832 (77%)

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 (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.