GeForce 840A vs GeForce GT 755M SLI

In this comparison between GeForce 840A and GeForce GT 755M SLI 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 SLI will be their preference. Study the comparison tables below and make your choice.

GeForce GT 755M SLI is a Laptop Graphics Card

Note: GeForce GT 755M SLI 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 SLI here:

Main Specs

  GeForce 840A GeForce GT 755M SLI
Power consumption (TDP) 33 Watt 2x ~50 Watt
Interface PCIe 3.0 x8
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 2x 2 GB
Display Connectors No outputs
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  • GeForce 840A has 1550% more power consumption, than GeForce GT 755M SLI.
  • GeForce 840A and GeForce GT 755M SLI have maximum RAM of 2 GB.
  • GeForce 840A is used in Desktops, and GeForce GT 755M SLI - in Laptops.
  • GeForce 840A is build with Maxwell architecture, and GeForce GT 755M SLI - with Kepler.
  • Core clock speed of GeForce 840A is 49 MHz higher, than GeForce GT 755M SLI.
  • GeForce 840A and GeForce GT 755M SLI are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 755M SLI is 3398 MHz higher, than GeForce 840A.

Game benchmarks

high / 1080p 3−4 14−16
ultra / 1080p 2−3 8−9
QHD / 1440p 0−1 2−3
low / 720p 14−16 30−35
medium / 1080p 5−6 18−20
The average gaming FPS of GeForce GT 755M SLI in Assassin's Creed Odyssey is 200% more, than GeForce 840A.

Full Specs

  GeForce 840A GeForce GT 755M SLI
Architecture Maxwell Kepler
Code name GM108 N14P-?
Type Desktop Laptop
Release date 17 March 2014 1 November 2013
Pipelines 384 768
Core clock speed 1029 MHz 980 MHz
Boost Clock 1124 MHz
Transistor count 2x 1300 Million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98
Floating-point performance 863.2 gflops
Memory bus width 64 Bit 2x 128 Bit
Memory clock speed 2002 MHz 5400 MHz
Memory bandwidth 16.02 GB/s
Shared memory -
DirectX 12 (11_0) DirectX 11, Shader 5.0
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
Vulkan 1.1.126
CUDA 5.0 +
Laptop size large
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