GeForce 840M vs Radeon HD 4870

When choosing between GeForce 840M and Radeon HD 4870, 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 4870.

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 4870
Power consumption (TDP) 33 Watt 150 Watt
Interface PCIe 3.0 x8 PCIe 2.0 x16
Supplementary power connectors 2x 6-pin
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 1 GB
Display Connectors No outputs 2x DVI, 1x S-Video
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  • Radeon HD 4870 has 354% more power consumption, than GeForce 840M.
  • GeForce 840M is connected by PCIe 3.0 x8, and Radeon HD 4870 uses PCIe 2.0 x16 interface.
  • GeForce 840M has 3 GB more memory, than Radeon HD 4870.
  • GeForce 840M is used in Laptops, and Radeon HD 4870 - in Desktops.
  • GeForce 840M is build with Maxwell architecture, and Radeon HD 4870 - with TeraScale.
  • Core clock speed of GeForce 840M is 279 MHz higher, than Radeon HD 4870.
  • GeForce 840M is manufactured by 28 nm process technology, and Radeon HD 4870 - by 55 nm process technology.
  • Memory clock speed of Radeon HD 4870 is 1600 MHz higher, than GeForce 840M.

Game benchmarks

high / 1080p 1−2 3−4
ultra / 1080p 0−1 1−2
QHD / 1440p 0−1 0−1
low / 720p 12−14 14−16
medium / 1080p 3−4 6−7
The average gaming FPS of Radeon HD 4870 in Assassin's Creed Odyssey is 33% more, than GeForce 840M.

Full Specs

  GeForce 840M Radeon HD 4870
Architecture Maxwell TeraScale
Code name N15S-GT RV770
Type Laptop Desktop
Release date 12 March 2014 25 June 2008
Pipelines 384 800
Core clock speed 1029 MHz 750 MHz
Boost Clock 1124 MHz
Transistor count 956 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 17.98 30.00
Floating-point performance 863.2 gflops 1,200.0 gflops
Length 250 mm
Memory bus width 64 Bit 256 Bit
Memory clock speed 2000 MHz 3600 MHz
Memory bandwidth 16.02 GB/s 115.2 GB/s
Shared memory -
DirectX 12 (11_0) 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.5 3.3
OpenCL 1.2 1.1
Vulkan 1.1.126 N/A
CUDA +
Bus support PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256) 92 Mh/s
Laptop size medium sized
Optimus +
GPU Boost 2.0
GameWorks +
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