GeForce GTX 870M vs Nvidia Titan X

Intro

Compare all that to the Nvidia Titan X, which comes with a GPU core clock speed of 1417 MHz, and 12288 MB of GDDR5X RAM set to run at 1251 MHz through a 384-bit bus. It also is made up of 3584 Stream Processors, 224 TAUs, and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Nvidia Titan X should perform quite a bit faster than the GeForce GTX 870M overall. (explain)

Nvidia Titan X		491520 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 395520 (412%)

Texel Rate

The Nvidia Titan X should be a lot (more or less 201%) better at AF than the GeForce GTX 870M. (explain)

Nvidia Titan X		317408 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 212016 (201%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Nvidia Titan X is the winner, by a large margin. (explain)

Nvidia Titan X		136032 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 113448 (502%)

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 maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one 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 worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.