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GeForce 840M vs Nvidia Titan X

Intro

The GeForce 840M features a GPU core clock speed of 1029 MHz, and the 2048 MB of DDR3 memory is set to run at 1000 MHz through a 64-bit bus. It also is made up of 384 Stream Processors, 24 TAUs, and 8 ROPs.

Compare those specs to the Nvidia Titan X, which features a GPU core clock speed of 1417 MHz, and 12288 MB of GDDR5X memory set to run at 1251 MHz through a 384-bit bus. It also is made up of 3584 SPUs, 224 Texture Address Units, and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M 30 Watts
Nvidia Titan X 250 Watts
Difference: 220 Watts (733%)

Memory Bandwidth

Performance-wise, the Nvidia Titan X should in theory be a lot superior to the GeForce 840M in general. (explain)

Nvidia Titan X 491520 MB/sec
GeForce 840M 16000 MB/sec
Difference: 475520 (2972%)

Texel Rate

The Nvidia Titan X is a lot (about 1185%) faster with regards to texture filtering than the GeForce 840M. (explain)

Nvidia Titan X 317408 Mtexels/sec
GeForce 840M 24696 Mtexels/sec
Difference: 292712 (1185%)

Pixel Rate

If using a high screen resolution is important to you, then the Nvidia Titan X is the winner, and very much so. (explain)

Nvidia Titan X 136032 Mpixels/sec
GeForce 840M 8232 Mpixels/sec
Difference: 127800 (1552%)

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

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GeForce 840M

Amazon.com

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Nvidia Titan X

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 840M Nvidia Titan X
Manufacturer nVidia nVidia
Year March 12 2014 August 2016
Code Name GM108 GP102-400
Memory 2048 MB 12288 MB
Core Speed 1029 MHz 1417 MHz
Memory Speed 2000 MHz 10008 MHz
Power (Max TDP) 30 watts 250 watts
Bandwidth 16000 MB/sec 491520 MB/sec
Texel Rate 24696 Mtexels/sec 317408 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 136032 Mpixels/sec
Unified Shaders 384 3584
Texture Mapping Units 24 224
Render Output Units 8 96
Bus Type DDR3 GDDR5X
Bus Width 64-bit 384-bit
Fab Process 28 nm 16 nm
Transistors (Unknown) million 12000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 are applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 840M

Amazon.com

Check prices at:

Nvidia Titan X

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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