GeForce 840A vs Radeon Pro 555X

When comparing GeForce 840A and Radeon Pro 555X, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce 840A and Radeon Pro 555X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon Pro 555X is a Laptop Graphics Card

Note: Radeon Pro 555X 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 Radeon Pro 555X here:

Main Specs

  GeForce 840A 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 2 GB 2 GB
Display Connectors No outputs No outputs
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  • Radeon Pro 555X has 127% more power consumption, than GeForce 840A.
  • Both video cards are using PCIe 3.0 x8 interface connection to a motherboard.
  • GeForce 840A and Radeon Pro 555X have maximum RAM of 2 GB.
  • GeForce 840A is used in Desktops, and Radeon Pro 555X - in Mobile workstations.
  • GeForce 840A is build with Maxwell architecture, and Radeon Pro 555X - with Polaris.
  • Core clock speed of GeForce 840A is 174 MHz higher, than Radeon Pro 555X.
  • GeForce 840A is manufactured by 28 nm process technology, and Radeon Pro 555X - by 14 nm process technology.
  • Memory clock speed of Radeon Pro 555X is 3078 MHz higher, than GeForce 840A.

Game benchmarks

high / 1080p 3−4 16−18
ultra / 1080p 2−3 10−11
QHD / 1440p 0−1 4−5
4K / 2160p 4−5
low / 720p 14−16 30−35
medium / 1080p 5−6 21−24
The average gaming FPS of Radeon Pro 555X in Assassin's Creed Odyssey is 233% more, than GeForce 840A.

Full Specs

  GeForce 840A Radeon Pro 555X
Architecture Maxwell Polaris
Code name GM108 Polaris 21
Type Desktop Mobile workstation
Release date 17 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 2002 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 4.6 4.6
OpenCL 1.2 2.0
Vulkan 1.1.126 1.2.131
CUDA 5.0
FreeSync +
Laptop size large
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