GeForce 840M vs Radeon Pro 555X

Find out if it is worth upgrading your current GPU setup by comparing GeForce 840M and Radeon Pro 555X. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce 840M and Radeon Pro 555X. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce 840M and Radeon Pro 555X are Laptop Graphics Cards

Note: GeForce 840M and Radeon Pro 555X are only used in laptop graphics. They have 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 840M or Radeon Pro 555X here:

Main Specs

  GeForce 840M Radeon Pro 555X
Power consumption (TDP) 33 Watt 75 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x8
Supplementary power connectors None
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 2 GB
Display Connectors No outputs No outputs
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  • Radeon Pro 555X has 127% more power consumption, than GeForce 840M.
  • Both video cards are using PCIe 3.0 x8 interface connection to a motherboard.
  • GeForce 840M has 2 GB more memory, than Radeon Pro 555X.
  • GeForce 840M is used in Laptops, and Radeon Pro 555X - in Mobile workstations.
  • GeForce 840M is build with Maxwell architecture, and Radeon Pro 555X - with Polaris.
  • Core clock speed of GeForce 840M is 174 MHz higher, than Radeon Pro 555X.
  • GeForce 840M is manufactured by 28 nm process technology, and Radeon Pro 555X - by 14 nm process technology.
  • Memory clock speed of Radeon Pro 555X is 3080 MHz higher, than GeForce 840M.

Game benchmarks

high / 1080p 1−2 16−18
ultra / 1080p 0−1 10−11
QHD / 1440p 0−1 4−5
4K / 2160p 4−5
low / 720p 12−14 30−35
medium / 1080p 3−4 21−24
The average gaming FPS of Radeon Pro 555X in Assassin's Creed Odyssey is 300% more, than GeForce 840M.

Full Specs

  GeForce 840M Radeon Pro 555X
Architecture Maxwell Polaris
Code name N15S-GT Polaris 21
Type Laptop Mobile workstation
Release date 12 March 2014 5 June 2017
Pipelines 384 768
Core clock speed 1029 MHz 855 MHz
Boost Clock 1124 MHz
Transistor count 3,000 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 17.98 43.54
Floating-point performance 863.2 gflops
Memory bus width 64 Bit 128 Bit
Memory clock speed 2000 MHz 5080 MHz
Memory bandwidth 16.02 GB/s 81.6 GB/s
Shared memory - -
DirectX 12 (11_0) 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.5 4.6
OpenCL 1.2 2.0
Vulkan 1.1.126 1.2.131
CUDA +
FreeSync +
Bus support PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256) 92 Mh/s
Laptop size medium sized large
Optimus +
GPU Boost 2.0
GameWorks +
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