GeForce 840M vs Radeon HD 7870

When choosing between GeForce 840M and Radeon HD 7870, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce 840M and Radeon HD 7870.

GeForce 840M is a Laptop Graphics Card

Note: GeForce 840M 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 840M here:

Main Specs

  GeForce 840M Radeon HD 7870
Power consumption (TDP) 33 Watt 175 Watt
Interface PCIe 3.0 x8
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 2 GB
Display Connectors No outputs
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  • Radeon HD 7870 has 430% more power consumption, than GeForce 840M.
  • GeForce 840M has 2 GB more memory, than Radeon HD 7870.
  • GeForce 840M is used in Laptops, and Radeon HD 7870 - in Desktops.
  • GeForce 840M is build with Maxwell architecture, and Radeon HD 7870 - with GCN.
  • Core clock speed of GeForce 840M is 29 MHz higher, than Radeon HD 7870.
  • GeForce 840M and Radeon HD 7870 are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 7870 is 2800 MHz higher, than GeForce 840M.

Game benchmarks

high / 1080p 1−2 24−27
ultra / 1080p 0−1 14−16
QHD / 1440p 0−1 9−10
4K / 2160p 6−7
low / 720p 12−14 45−50
medium / 1080p 3−4 30−33
The average gaming FPS of Radeon HD 7870 in Assassin's Creed Odyssey is 466% more, than GeForce 840M.

Full Specs

  GeForce 840M Radeon HD 7870
Architecture Maxwell GCN
Code name N15S-GT Pitcairn XT
Type Laptop Desktop
Release date 12 March 2014 5 March 2012
Pipelines 384 1280
Core clock speed 1029 MHz 1000 MHz
Boost Clock 1124 MHz
Transistor count 2800 Million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98
Floating-point performance 863.2 gflops
Memory bus width 64 Bit 256 Bit
Memory clock speed 2000 MHz 4800 MHz
Memory bandwidth 16.02 GB/s
Shared memory - -
DirectX 12 (11_0) DirectX 11.1, Shader 5.1
Shader Model 5.1
OpenGL 4.5
OpenCL 1.2
Vulkan 1.1.126
CUDA +
Monero / XMR (CryptoNight) 0.39 kh/s
Bus support PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256) 92 Mh/s
Laptop size medium sized
Optimus +
Eyefinity +
Decred / DCR (Decred) 0.63 Gh/s
Ethereum / ETH (DaggerHashimoto) 16.6 Mh/s
Zcash / ZEC (Equihash) 145 Sol/s
GPU Boost 2.0
GameWorks +
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