"Can I use a weaker PC for basic content?
With weaker hardware, it may be possible to run very graphically simplistic content like virtual desktop, virtual cinema (for watching movies), and 360 videos, however you will be totally on your own without support if you choose to do this, and it is unlikely that there will be many (or any) games that support lower specs.
If you do wish to take this non-recommended path, your PC must at least meet the absolute minimum requirements:
Video Card: GTX 650 / AMD 7750 desktop GPU or better and newer
USB Ports: 2x USB 3.0 ports
Video Output: free HDMI 1.3 output
OS: Windows 7 SP1 64 bit or newer
Remember: The Rift will not run on your laptop, this rule does not change!" https://www.reddit.com/r/oculus/wiki/requirements