GeForce GT 640M vs Mobility Radeon HD 4870

When choosing between GeForce GT 640M and Mobility 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 GT 640M and Mobility Radeon HD 4870.

GeForce GT 640M and Mobility Radeon HD 4870 are Laptop Graphics Cards

Note: GeForce GT 640M and Mobility Radeon HD 4870 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 GT 640M or Mobility Radeon HD 4870 here:

Main Specs

  GeForce GT 640M Mobility Radeon HD 4870
Power consumption (TDP) 32 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors No outputs No outputs
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  • GeForce GT 640M is connected by PCIe 3.0 x16, and Mobility Radeon HD 4870 uses PCIe 2.0 x16 interface.
  • GeForce GT 640M has 1 GB more memory, than Mobility Radeon HD 4870.
  • Both cards are used in Laptops.
  • GeForce GT 640M is build with Kepler architecture, and Mobility Radeon HD 4870 - with Terascale 1.
  • GeForce GT 640M is manufactured by 28 nm process technology, and Mobility Radeon HD 4870 - by 55 nm process technology.
  • Memory clock speed of GeForce GT 640M is 912 MHz higher, than Mobility Radeon HD 4870.

Game benchmarks

high / 1080p 0−1 7−8
ultra / 1080p 0−1 4−5
QHD / 1440p 0−1 0−1
low / 720p 10−12 16−18
medium / 1080p 2−3 8−9
The average gaming FPS of Mobility Radeon HD 4870 in Assassin's Creed Odyssey is 100% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Mobility Radeon HD 4870
Architecture Kepler Terascale 1
Code name N13P-GS M98-XT
Type Laptop Laptop
Release date 22 March 2012 9 January 2009
Pipelines 384 800
Core clock speed 550 MHz
Boost Clock 645 MHz
Transistor count 1,270 million 956 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 22.00
Floating-point performance 480.0 gflops 880.0 gflops
Memory bus width 128bit 256 Bit
Memory clock speed 1800 - 4000 MHz 888 MHz
Memory bandwidth 56.83 GB/s
Shared memory - -
DirectX 12 API 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.5 3.3
OpenCL 1.1 1.1
Vulkan 1.1.126 N/A
CUDA +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 18 Mh/s
Laptop size medium sized large
Optimus +
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