It sounds like this has to do with the drivers for the HD3000 on Linux vs. Windows. Linux distros use Mesa as the driver, and Windows uses whatever Intel makes for it. There is a lot of time and effort put into Mesa (a few different companies actually contribute to it) so it's very robust in many regards, and from what I understand this can translate into higher performance on Linux in comparison to Windows. I believe this kind of stuff has been documented on Phoronix a few times before.
So, it's probably just an instance of drivers on one OS being better than another. Not sure there's a huge difference in other hardware (such as AMD or Nvidia GPUs). Intel iGPUs are a special case it seems where the performance disparities are that pronounced.
So, it's probably just an instance of drivers on one OS being better than another. Not sure there's a huge difference in other hardware (such as AMD or Nvidia GPUs). Intel iGPUs are a special case it seems where the performance disparities are that pronounced.