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GeForce 940M vs GeForce GTX 870M

Intro

The GeForce 940M comes with a clock frequency of 1072 MHz and a DDR3 memory frequency of 1000 MHz. It also makes use of a 64-bit memory bus, and makes use of a 28 nm design. It is comprised of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Compare those specs to the GeForce GTX 870M, which has clock speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 Texture Address Units and 24 ROPs.

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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 870M 4770 points
GeForce 940M 1740 points
Difference: 3030 (174%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 870M, in theory, should be much faster than the GeForce 940M overall. (explain)

GeForce GTX 870M 96000 MB/sec
GeForce 940M 16000 MB/sec
Difference: 80000 (500%)

Texel Rate

The GeForce GTX 870M will be a lot (more or less 310%) more effective at anisotropic filtering than the GeForce 940M. (explain)

GeForce GTX 870M 105392 Mtexels/sec
GeForce 940M 25728 Mtexels/sec
Difference: 79664 (310%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 870M is superior to the GeForce 940M, by far. (explain)

GeForce GTX 870M 22584 Mpixels/sec
GeForce 940M 8576 Mpixels/sec
Difference: 14008 (163%)

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 940M

Amazon.com

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GeForce GTX 870M

Amazon.com

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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 940M GeForce GTX 870M
Manufacturer nVidia nVidia
Year March 12 2015 March 12 2014
Code Name GM108 GK104
Memory 2048 MB 3072 MB
Core Speed 1072 MHz 941 MHz
Memory Speed 2000 MHz 4000 MHz
Power (Max TDP) (Unknown) watts 110 watts
Bandwidth 16000 MB/sec 96000 MB/sec
Texel Rate 25728 Mtexels/sec 105392 Mtexels/sec
Pixel Rate 8576 Mpixels/sec 22584 Mpixels/sec
Unified Shaders 384 1344
Texture Mapping Units 24 112
Render Output Units 8 24
Bus Type DDR3 GDDR5
Bus Width 64-bit 192-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 940M

Amazon.com

Check prices at:

GeForce GTX 870M

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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