I have the P400S TG edition and i would like to mount my new Aorus GPU vertically. But before i would go ahead and buy the bracket, i want to know if it actually supports it or not.
It might help if you told us what bracket you want to get mate. If you're talking about the Phanteks one, then the answer is no, because that's designed for the more expensive Phanteks cases that have what are called "Open" PCI slots. That is, no horizontal metal bars between each PCI mounting slot on the case frame. You can cut those away, however, if you are OK with modding your case. If not, CableMod do a vertical bracket that allows you to vertically mount a GPU without needing to cut away parts of your case.