Exactly what kind of hardware may be needed for the Oculus Rift CV1 is a common question. VRCircle has certainly attempted to answer these questions by speculating to the possible resolution of the Oculus Rift CV1. We also found out the exact hardware Oculus ran their demos during CES 2015, which is the Falcon Northwest Tiki.
In an interview with Nate Mitchell at CES 2015 (via Maximum PC) in a question asking if the consumer version will run higher than 90Hz, Nate answered:
You can expect it to be at least 90Hz, if not higher. Which is interestingly enough a big challenge on the PC side – you’re going to need a pretty hefty GPU to drive this thing.
When you think about it, even at 1080p, a 90Hz display, when you’re rendering stereo, that’s really heavy processing power that most games today aren’t even designed to run at.
For the big PC fans out there, you’re in luck, you are going to need a great rig to power the Rift.
Over time we do want to bring that to the lower-end hardware, but to really get the quality experience and fidelity that we want to deliver, especially for V1, it is going to be a high-end card. And the machines we’re using today for the Crescent Bay demos, they’re running NVidia 980s, which are high-end cards.
PC gamer's with lessor cards can of course turn down the in-game settings and possibly maintain 90 Hz or more. However if you truly want the experience Oculus is showing in their demos, with in-game eye candy turned on, then pony up for the high-end graphics card.