GeForce 945M vs Iris Pro Graphics 580

If you are going to buy a new graphics card and are choosing between GeForce 945M and Iris Pro Graphics 580, 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 945M stacks up against Iris Pro Graphics 580, check out specs charts below.

GeForce 945M and Iris Pro Graphics 580 are Laptop Graphics Cards

Note: GeForce 945M and Iris Pro Graphics 580 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 945M or Iris Pro Graphics 580 here:

Main Specs

  GeForce 945M Iris Pro Graphics 580
Power consumption (TDP) 75 Watt 15 Watt
Interface MXM-B (3.0) PCIe 3.0 x1
Supplementary power connectors None
Memory type DDR3 DDR3L/LPDDR3/DDR4
Maximum RAM amount 4 GB 64 GB
Display Connectors No outputs No outputs
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  • GeForce 945M has 400% more power consumption, than Iris Pro Graphics 580.
  • GeForce 945M is connected by MXM-B (3.0), and Iris Pro Graphics 580 uses PCIe 3.0 x1 interface.
  • Iris Pro Graphics 580 has 60 GB more memory, than GeForce 945M.
  • Both cards are used in Laptops.
  • GeForce 945M is build with Maxwell architecture, and Iris Pro Graphics 580 - with Gen. 9 Skylake.
  • Core clock speed of GeForce 945M is 578 MHz higher, than Iris Pro Graphics 580.
  • GeForce 945M is manufactured by 28 nm process technology, and Iris Pro Graphics 580 - by 14 nm process technology.

Game benchmarks

high / 1080p 10−11 9−10
ultra / 1080p 6−7 5−6
QHD / 1440p 1−2 0−1
low / 720p 24−27 20−22
medium / 1080p 12−14 10−12
The average gaming FPS of GeForce 945M in Assassin's Creed Odyssey is 18% more, than Iris Pro Graphics 580.

Full Specs

  GeForce 945M Iris Pro Graphics 580
Architecture Maxwell Gen. 9 Skylake
Code name GM107 Skylake GT4e
Type Laptop Laptop
Release date 12 March 2015 1 September 2015
Pipelines 512 72
Core clock speed 928 MHz 350 MHz
Boost Clock 1045 MHz 1050 MHz
Transistor count 1,870 million 189 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 40.80 72.00
Floating-point performance 953.9 gflops
Memory bus width 128 Bit
Memory clock speed 2000 MHz
Memory bandwidth 28.8 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 1.1.97
CUDA +
Bus support PCI Express 3.0
Bitcoin / BTC (SHA256) 107 Mh/s
Laptop size medium sized
Optimus +
Quick Sync +
GPU Boost 2.0
GameWorks +
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