For those that are hovering over the purchase button, be aware the Oculus compatibility test is a guideline that looks up your specs and compares it to a minimum recommended spec database.. It doesn't actually test your computer. Some part of your machine could be close and fail. My old 2550k and usb 2 failed but ran the Riftfine, as an example. The Steam VR performance test will test your gpu/cpu and overall rig's performance , but it doesn't test usb. Even though ED recommends a gtx 980 many have played with less (gtx 970 as an example is the min for VR in general) with some reduction of graphics settings. Usb 3.0 is recommended for multiple sensors, but Oculus ships a 3.0 cable with the 3rd sensor so that the usb bus isn't flooded. The main key in regards to usb is to have a good (recommended) controller on board or add in and to spread the Rift and sensor(s) over multiple ports (hubs) for the optimum performance. One can get away with a slightly under spec setup if the overall rig is close. A really good indicator is the VRMark Orange Room benchmark which shows the Oculus minimum for VR in it's online results. It will also show your fps during the test.The Oculus test as not carved in stone. A fail there doesn't me you can't succeed, but the Rift will nag you about the weakness each time you don the hmd until your parts are up to their minimum. I would run all 3 tests.
Good advice for those with a borderline PC!