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GeForce 810M vs GeForce 840M

Intro

The GeForce 810M comes with a clock frequency of 738 MHz and a DDR3 memory speed of 900 MHz. It also features a 64-bit memory bus, and makes use of a 28 nm design. It is made up of 48 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Compare all of that to the GeForce 840M, which has a core clock frequency of 1029 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 810M 15 Watts
GeForce 840M 30 Watts
Difference: 15 Watts (100%)

Memory Bandwidth

As far as performance goes, the GeForce 840M should in theory be a little bit superior to the GeForce 810M in general. (explain)

GeForce 840M 16000 MB/sec
GeForce 810M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The GeForce 840M is a lot (more or less 318%) faster with regards to texture filtering than the GeForce 810M. (explain)

GeForce 840M 24696 Mtexels/sec
GeForce 810M 5904 Mtexels/sec
Difference: 18792 (318%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 840M is a better choice, by far. (explain)

GeForce 840M 8232 Mpixels/sec
GeForce 810M 2952 Mpixels/sec
Difference: 5280 (179%)

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 810M

Amazon.com

Check prices at:

GeForce 840M

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 810M GeForce 840M
Manufacturer nVidia nVidia
Year February 2014 March 12 2014
Code Name GF117 GM108
Memory 1024 MB 2048 MB
Core Speed 738 MHz 1029 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) 15 watts 30 watts
Bandwidth 14400 MB/sec 16000 MB/sec
Texel Rate 5904 Mtexels/sec 24696 Mtexels/sec
Pixel Rate 2952 Mpixels/sec 8232 Mpixels/sec
Unified Shaders 48 384
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 810M

Amazon.com

Check prices at:

GeForce 840M

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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