Simple question really, is it possible to install an OS such as Windows or Ubuntu on a PCI-Express SSD (solid state drive)?
And if so is it as straight forward as selecting that drive on install?
It depends on the drive, but in my experience, it is not as easy as a standard hard drive.
There are many different sorts of PCI Express SSDs, however most of them I have come across basically act as raid/sata extenders. They usually come with a driver disk and all you have to do is during Windows setup, click on the load driver button and then it will work as a normal hard drive.
(Bottom left hand corner).
However, you may get lucky and it may use a chip that Windows knows and it could just work.