GeForce GTX 870M vs GeForce GTX Titan Black

Intro

Compare those specs to the GeForce GTX Titan Black, which features core clock speeds of 889 MHz on the GPU, and 1750 MHz on the 6144 MB of GDDR5 memory. It features 2880 SPUs as well as 240 Texture Address Units and 48 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 Titan Black		11666 points
GeForce GTX 870M		4770 points
	Difference: 6896 (145%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 140 Watts (127%)

Memory Bandwidth

The GeForce GTX Titan Black should in theory be much faster than the GeForce GTX 870M overall. (explain)

GeForce GTX Titan Black		336000 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 240000 (250%)

Texel Rate

The GeForce GTX Titan Black should be quite a bit (more or less 102%) better at AF than the GeForce GTX 870M. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 107968 (102%)

Pixel Rate

The GeForce GTX Titan Black will be a lot (about 89%) better at FSAA than the GeForce GTX 870M, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 20088 (89%)

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 information (in units of MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.