GeForce 940M vs Iris Plus Graphics 645

When choosing between GeForce 940M and Iris Plus Graphics 645, 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 940M and Iris Plus Graphics 645.

GeForce 940M and Iris Plus Graphics 645 are Laptop Graphics Cards

Note: GeForce 940M and Iris Plus Graphics 645 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 940M or Iris Plus Graphics 645 here:

Main Specs

  GeForce 940M Iris Plus Graphics 645
Power consumption (TDP) 75 Watt 15 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x1
Memory type DDR3 DDR3/DDR4
Maximum RAM amount 4 GB
Display Connectors No outputs No outputs
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  • GeForce 940M has 400% more power consumption, than Iris Plus Graphics 645.
  • GeForce 940M is connected by PCIe 3.0 x8, and Iris Plus Graphics 645 uses PCIe 3.0 x1 interface.
  • Both cards are used in Laptops.
  • GeForce 940M is build with Maxwell architecture, and Iris Plus Graphics 645 - with Gen. 9.5 Coffee Lake.
  • Core clock speed of GeForce 940M is 772 MHz higher, than Iris Plus Graphics 645.
  • GeForce 940M is manufactured by 28 nm process technology, and Iris Plus Graphics 645 - by 14 nm process technology.

Game benchmarks

high / 1080p 2−3 4−5
ultra / 1080p 1−2 2−3
QHD / 1440p 0−1 0−1
low / 720p 12−14 12−14
medium / 1080p 4−5 5−6
The average gaming FPS of Iris Plus Graphics 645 in Assassin's Creed Odyssey is 20% more, than GeForce 940M.

Full Specs

  GeForce 940M Iris Plus Graphics 645
Architecture Maxwell Gen. 9.5 Coffee Lake
Code name N16S-GT-S/B Kaby Lake GT3e
Type Laptop Laptop
Release date 12 March 2015 10 July 2019
Pipelines 384 48
Core clock speed 1072 MHz 300 MHz
Boost Clock 1176 MHz 1150 MHz
Transistor count 1,870 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 28.22 50.40
Floating-point performance 903.2 gflops
Memory bus width 64 Bit
Memory clock speed 2000 MHz
Memory bandwidth 14.4 GB/s
Shared memory - +
DirectX 12 (11_0) 12 (12_1)
Shader Model 5.1 6.4
OpenGL 4.5 4.6
OpenCL 1.2 2.1
Vulkan 1.1.126 1.1.103
CUDA +
Bus support PCI Express 3.0
Bitcoin / BTC (SHA256) 101 Mh/s
Laptop size medium sized
Optimus +
Quick Sync +
GPU Boost 2.0
GameWorks +
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