GeForce 840A vs GeForce GTX 860M

When choosing between GeForce 840A and GeForce GTX 860M, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce 840A and GeForce GTX 860M.

GeForce GTX 860M is a Laptop Graphics Card

Note: GeForce GTX 860M is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with GeForce GTX 860M here:

Main Specs

  GeForce 840A GeForce GTX 860M
Power consumption (TDP) 33 Watt 75 Watt
Interface PCIe 3.0 x8 MXM-B (3.0)
Supplementary power connectors None
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 860M has 127% more power consumption, than GeForce 840A.
  • GeForce 840A is connected by PCIe 3.0 x8, and GeForce GTX 860M uses MXM-B (3.0) interface.
  • GeForce GTX 860M has 2 GB more memory, than GeForce 840A.
  • GeForce 840A is used in Desktops, and GeForce GTX 860M - in Laptops.
  • GeForce 840A and GeForce GTX 860M are build with Maxwell architecture.
  • Core clock speed of GeForce 840A is 232 MHz higher, than GeForce GTX 860M.
  • GeForce 840A and GeForce GTX 860M are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 3−4 16−18
ultra / 1080p 2−3 10−11
QHD / 1440p 0−1 5−6
4K / 2160p 4−5
low / 720p 14−16 30−35
medium / 1080p 5−6 21−24
The average gaming FPS of GeForce GTX 860M in Assassin's Creed Odyssey is 233% more, than GeForce 840A.

Full Specs

  GeForce 840A GeForce GTX 860M
Architecture Maxwell Maxwell
Code name GM108 N15P-GX
Type Desktop Laptop
Release date 17 March 2014 12 March 2014
Pipelines 384 640
Core clock speed 1029 MHz 797 MHz
Boost Clock 1124 MHz 915 MHz
Transistor count 1,870 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98 43.40
Floating-point performance 863.2 gflops 1,389 gflops
Memory bus width 64 Bit 128 Bit
Memory clock speed 2002 MHz
Memory bandwidth 16.02 GB/s 80.0 GB/s
Shared memory -
DirectX 12 (11_0) 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.6 4.5
OpenCL 1.2 1.1
Vulkan 1.1.126 1.1.126
CUDA 5.0 +
CUDA cores 1152 or 640
Bus support PCI Express 2.0, PCI Express 3.0
SLI options +
HDMI +
Bitcoin / BTC (SHA256) 163 Mh/s
Laptop size medium sized
Standard memory configuration GDDR5
eDP 1.2 signal support Up to 3840x2160
LVDS signal support Up to 1920x1200
DisplayPort Multimode (DP++) support Up to 3840x2160
HDCP content protection +
7.1 channel HD audio on HDMI +
TrueHD and DTS-HD audio bitstreaming +
H.264, VC1, MPEG2 1080p video decoder +
Optimus +
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