GeForce 940MX vs Iris Pro Graphics P580

When choosing between GeForce 940MX and Iris Pro Graphics P580, 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 940MX and Iris Pro Graphics P580.

GeForce 940MX and Iris Pro Graphics P580 are Laptop Graphics Cards

Note: GeForce 940MX and Iris Pro Graphics P580 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 940MX or Iris Pro Graphics P580 here:

Main Specs

  GeForce 940MX Iris Pro Graphics P580
Power consumption (TDP) 23 Watt 15 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x1
Supplementary power connectors None
Memory type DDR3, GDDR5 DDR3L/LPDDR3/DDR4
Maximum RAM amount 4 GB 64 GB
Display Connectors No outputs No outputs
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  • GeForce 940MX has 53% more power consumption, than Iris Pro Graphics P580.
  • GeForce 940MX is connected by PCIe 3.0 x8, and Iris Pro Graphics P580 uses PCIe 3.0 x1 interface.
  • Iris Pro Graphics P580 has 60 GB more memory, than GeForce 940MX.
  • Both cards are used in Laptops.
  • GeForce 940MX is build with Maxwell architecture, and Iris Pro Graphics P580 - with Gen. 9 Skylake.
  • Core clock speed of GeForce 940MX is 772 MHz higher, than Iris Pro Graphics P580.
  • GeForce 940MX is manufactured by 28 nm process technology, and Iris Pro Graphics P580 - by 14 nm process technology.

Game benchmarks

high / 1080p 7−8 10−11
ultra / 1080p 4−5 6−7
QHD / 1440p 0−1 0−1
low / 720p 16−18 21−24
medium / 1080p 8−9 12−14
The average gaming FPS of Iris Pro Graphics P580 in Assassin's Creed Odyssey is 44% more, than GeForce 940MX.

Full Specs

  GeForce 940MX Iris Pro Graphics P580
Architecture Maxwell Gen. 9 Skylake
Code name N16S-GTR-B/S Skylake GT4e
Type Laptop Laptop
Release date 10 March 2016 1 September 2015
Pipelines 384 72
Core clock speed 1122 MHz 350 MHz
Boost Clock 1242 MHz 1100 MHz
Transistor count 1,870 million 189 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 23.83 75.60
Floating-point performance 762.6 gflops
Memory bus width 64 Bit
Memory clock speed 4000 MHz
Memory bandwidth 40.1 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 1.1.97
CUDA +
Bus support PCI Express 3.0
Bitcoin / BTC (SHA256) 102 Mh/s
Laptop size medium sized
Optimus +
Quick Sync +
GPU Boost 2.0
GameWorks +
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