GeForce 840M vs Radeon HD 8770M

When comparing GeForce 840M and Radeon HD 8770M, 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 840M and Radeon HD 8770M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce 840M and Radeon HD 8770M are Laptop Graphics Cards

Note: GeForce 840M and Radeon HD 8770M 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 HD 8770M here:

Main Specs

  GeForce 840M Radeon HD 8770M
Power consumption (TDP) 33 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x8
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 2 GB
Display Connectors No outputs No outputs
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  • Both video cards are using PCIe 3.0 x8 interface connection to a motherboard.
  • GeForce 840M has 2 GB more memory, than Radeon HD 8770M.
  • Both cards are used in Laptops.
  • GeForce 840M is build with Maxwell architecture, and Radeon HD 8770M - with GCN.
  • Core clock speed of GeForce 840M is 254 MHz higher, than Radeon HD 8770M.
  • GeForce 840M and Radeon HD 8770M are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 8770M is 2500 MHz higher, than GeForce 840M.

Game benchmarks

high / 1080p 1−2 7−8
ultra / 1080p 0−1 4−5
QHD / 1440p 0−1 0−1
low / 720p 12−14 16−18
medium / 1080p 3−4 8−9
The average gaming FPS of Radeon HD 8770M in Assassin's Creed Odyssey is 83% more, than GeForce 840M.

Full Specs

  GeForce 840M Radeon HD 8770M
Architecture Maxwell GCN
Code name N15S-GT Mars
Type Laptop Laptop
Release date 12 March 2014 16 November 2012
Pipelines 384 384
Core clock speed 1029 MHz 775 MHz
Boost Clock 1124 MHz 825 MHz
Transistor count 950 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98 19.80
Floating-point performance 863.2 gflops 633.6 gflops
Memory bus width 64 Bit 128 Bit
Memory clock speed 2000 MHz 4500 MHz
Memory bandwidth 16.02 GB/s 72 GB/s
Shared memory - -
DirectX 12 (11_0) 12 (11_1)
Shader Model 5.1 5.1
OpenGL 4.5 4.6
OpenCL 1.2 1.2
Vulkan 1.1.126 1.2.131
CUDA +
Bus support PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256) 92 Mh/s
Laptop size medium sized medium sized
Optimus +
GPU Boost 2.0
GameWorks +
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