GeForce GT 640M vs Radeon HD 7870M

Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Radeon HD 7870M. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640M and Radeon HD 7870M. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce GT 640M and Radeon HD 7870M are Laptop Graphics Cards

Note: GeForce GT 640M and Radeon HD 7870M 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 Radeon HD 7870M here:

Main Specs

  GeForce GT 640M Radeon HD 7870M
Power consumption (TDP) 32 Watt 45 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • Radeon HD 7870M has 40% more power consumption, than GeForce GT 640M.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • GeForce GT 640M and Radeon HD 7870M have maximum RAM of 2 GB.
  • Both cards are used in Laptops.
  • GeForce GT 640M is build with Kepler architecture, and Radeon HD 7870M - with GCN.
  • GeForce GT 640M and Radeon HD 7870M are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 7870M is 2200 MHz higher, than GeForce GT 640M.

Game benchmarks

high / 1080p 0−1 6−7
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 Radeon HD 7870M in Assassin's Creed Odyssey is 100% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Radeon HD 7870M
Architecture Kepler GCN
Code name N13P-GS Heathrow XT
Type Laptop Laptop
Release date 22 March 2012 24 April 2012
Pipelines 384 640
Core clock speed 800 MHz
Boost Clock 645 MHz
Transistor count 1,270 million 1,500 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 32.00
Floating-point performance 480.0 gflops 1,024 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 4000 MHz
Memory bandwidth 64 GB/s
Shared memory - -
DirectX 12 API 12 (11_1)
Shader Model 5.1 5.1
OpenGL 4.5 4.6
OpenCL 1.1 1.2
Vulkan 1.1.126 1.2.131
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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