When games do come to the device, they’re going to need a lot of power. Nvidia says that normal, 1080p games transmit about 60 MB of visual data per second. That number is much higher for virtual reality, because the video needs to be sent to each eye individually, and operate at a higher frame rate (that means more rendered pictures per second). The two big graphics card companies, AMD and Nvidia, both suggest nearly top-tier GPUs as a baseline for VR. AMD recommends the R9 390, which costs around $339, and Nvidia recommends the GTX 970, which runs about the same price. That’s at the low end. The demos that most journalists have tried run on rigs with Nvidia GTX Titan Xs, which retails for $999.