GeForce 940M vs Iris Plus Graphics 640

If you are going to buy a new graphics card and are choosing between GeForce 940M and Iris Plus Graphics 640, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce 940M stacks up against Iris Plus Graphics 640, check out specs charts below.

GeForce 940M and Iris Plus Graphics 640 are Laptop Graphics Cards

Note: GeForce 940M and Iris Plus Graphics 640 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 640 here:

Main Specs

  GeForce 940M Iris Plus Graphics 640
Power consumption (TDP) 75 Watt 15 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x1
Memory type DDR3 DDR3L/LPDDR3/DDR4
Maximum RAM amount 4 GB 32 GB
Display Connectors No outputs No outputs
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  • GeForce 940M has 400% more power consumption, than Iris Plus Graphics 640.
  • GeForce 940M is connected by PCIe 3.0 x8, and Iris Plus Graphics 640 uses PCIe 3.0 x1 interface.
  • Iris Plus Graphics 640 has 28 GB more memory, than GeForce 940M.
  • Both cards are used in Laptops.
  • GeForce 940M is build with Maxwell architecture, and Iris Plus Graphics 640 - with Gen. 9.5 Kaby Lake.
  • Core clock speed of GeForce 940M is 772 MHz higher, than Iris Plus Graphics 640.
  • GeForce 940M is manufactured by 28 nm process technology, and Iris Plus Graphics 640 - by 14 nm process technology.

Game benchmarks

high / 1080p 2−3 6−7
ultra / 1080p 1−2 4−5
QHD / 1440p 0−1 0−1
low / 720p 12−14 16−18
medium / 1080p 4−5 8−9
The average gaming FPS of Iris Plus Graphics 640 in Assassin's Creed Odyssey is 80% more, than GeForce 940M.

Full Specs

  GeForce 940M Iris Plus Graphics 640
Architecture Maxwell Gen. 9.5 Kaby Lake
Code name N16S-GT-S/B Kaby Lake GT3e
Type Laptop Laptop
Release date 12 March 2015 3 January 2017
Pipelines 384 48
Core clock speed 1072 MHz 300 MHz
Boost Clock 1176 MHz 1050 MHz
Transistor count 1,870 million 189 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 28.22 52.80
Floating-point performance 903.2 gflops
Memory bus width 64 Bit 64/128 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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