GeForce GTX 870M vs Nvidia Titan X

Intro

Compare that to the Nvidia Titan X, which comes with a GPU core clock speed of 1417 MHz, and 12288 MB of GDDR5X memory running at 1251 MHz through a 384-bit bus. It also features 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

Theoretically, the Nvidia Titan X should perform a lot 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 is much (approximately 201%) faster with regards to 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 high levels of AA is important to you, then the Nvidia Titan X is superior to the GeForce GTX 870M, and very much so. (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 max amount of information (measured in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 processed per 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.