All you need to know is if it is installed in UEFI mode
Right click my computer, click on Disk Management, you should see your OS disk has several partitions, 450MB Recovery partition, 100MB EFI system, the rest as your Primary partition, there is another small partition but you won't be able to see it
I have Win 7 on my Intel 750 and Win 10 on my Samsung 950 in this image, both installed in UEFI mode, I hade to have a USB drive with Intel NVME drivers to install Win 7 as it does not have NVME drivers, Win 10 has NVME drivers but it is recommended to install the Samsung NVME drivers after installation for optimal performance