GeForce 840A vs GeForce GT 755M

In this comparison between GeForce 840A and GeForce GT 755M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 840A will be the best choice, for others GeForce GT 755M will be their preference. Study the comparison tables below and make your choice.

GeForce GT 755M is a Laptop Graphics Card

Note: GeForce GT 755M 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 GT 755M here:

Main Specs

  GeForce 840A GeForce GT 755M
Power consumption (TDP) 33 Watt 50 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x16
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs No outputs
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  • GeForce GT 755M has 51% more power consumption, than GeForce 840A.
  • GeForce 840A is connected by PCIe 3.0 x8, and GeForce GT 755M uses PCIe 3.0 x16 interface.
  • GeForce GT 755M has 2 GB more memory, than GeForce 840A.
  • GeForce 840A is used in Desktops, and GeForce GT 755M - in Laptops.
  • GeForce 840A is build with Maxwell architecture, and GeForce GT 755M - with Kepler.
  • Core clock speed of GeForce 840A is 49 MHz higher, than GeForce GT 755M.
  • GeForce 840A and GeForce GT 755M are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 755M is 3398 MHz higher, than GeForce 840A.

Game benchmarks

high / 1080p 3−4 7−8
ultra / 1080p 2−3 4−5
QHD / 1440p 0−1 0−1
low / 720p 14−16 18−20
medium / 1080p 5−6 9−10
The average gaming FPS of GeForce GT 755M in Assassin's Creed Odyssey is 66% more, than GeForce 840A.

Full Specs

  GeForce 840A GeForce GT 755M
Architecture Maxwell Kepler
Code name GM108 N14P-
Type Desktop Laptop
Release date 17 March 2014 25 June 2013
Pipelines 384 384
Core clock speed 1029 MHz 980 MHz
Boost Clock 1124 MHz
Transistor count 1,270 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98 31.36
Floating-point performance 863.2 gflops 752.6 gflops
Memory bus width 64 Bit 128 Bit
Memory clock speed 2002 MHz 5400 MHz
Memory bandwidth 16.02 GB/s 86.4 GB/s
Shared memory -
DirectX 12 (11_0) 12 API
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 +
Bus support PCI Express 3.0, PCI Express 2.0
HDMI +
Bitcoin / BTC (SHA256) 27 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 +
Blu-Ray 3D Support +
3D Vision / 3DTV Play +
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