GeForce 840A vs Radeon R9 M395X

When comparing GeForce 840A and Radeon R9 M395X, 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 R9 M395X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon R9 M395X is a Laptop Graphics Card

Note: Radeon R9 M395X 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 R9 M395X here:

Main Specs

  GeForce 840A Radeon R9 M395X
Power consumption (TDP) 33 Watt 250 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x16
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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  • Radeon R9 M395X has 657% more power consumption, than GeForce 840A.
  • GeForce 840A is connected by PCIe 3.0 x8, and Radeon R9 M395X uses PCIe 3.0 x16 interface.
  • Radeon R9 M395X has 2 GB more memory, than GeForce 840A.
  • GeForce 840A is used in Desktops, and Radeon R9 M395X - in Laptops.
  • GeForce 840A is build with Maxwell architecture, and Radeon R9 M395X - with GCN 3.
  • Core clock speed of GeForce 840A is 306 MHz higher, than Radeon R9 M395X.
  • GeForce 840A and Radeon R9 M395X are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce 840A is 752 MHz higher, than Radeon R9 M395X.

Game benchmarks

high / 1080p 3−4 24−27
ultra / 1080p 2−3 14−16
QHD / 1440p 0−1 9−10
4K / 2160p 6−7
low / 720p 14−16 45−50
medium / 1080p 5−6 30−35
The average gaming FPS of Radeon R9 M395X in Assassin's Creed Odyssey is 400% more, than GeForce 840A.

Full Specs

  GeForce 840A Radeon R9 M395X
Architecture Maxwell GCN 3
Code name GM108 Amethyst XT
Type Desktop Laptop
Release date 17 March 2014 16 October 2014
Pipelines 384 2048
Core clock speed 1029 MHz 723 MHz
Boost Clock 1124 MHz
Transistor count 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98 92.54
Floating-point performance 863.2 gflops 2,961 gflops
Memory bus width 64 Bit 256 Bit
Memory clock speed 2002 MHz 1250 MHz
Memory bandwidth 16.02 GB/s 160.0 GB/s
Shared memory -
DirectX 12 (11_0)
Shader Model 5.1 6.3
OpenGL 4.6 4.4
OpenCL 1.2 Not Listed
Vulkan 1.1.126
CUDA 5.0
FreeSync +
Bus support PCIe 3.0
Bitcoin / BTC (SHA256) 413 Mh/s
Laptop size large
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
TrueAudio +
ZeroCore +
Switchable graphics +
Mantle +
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