This configuration is based on Elmo cameras and goes up to 3K.
The camera used are the Qbic Panorama X: http://www.video-stitch.com/360-camera-rigs-elmo/
The HDMI and power cables we use are straight ones (not angled).
We use this USB hub to power the cameras: http://www.amazon.fr/Chargeur-Secteur-USB-Ports-Anker/dp/B00Q4LFQWG/ref=sr_1_1
The acquisition cards are Magewell HDMI-to-USB3 converters (XI100DUSB-HDMI). They allow us to use the laptop USB ports to get the input signal from the camera. You will need one adaptor (and one USB port) per camera that is 4 with this rig.
The laptop is: Gigabyte P34W v3 (512Go/W8.1). We picked this laptop because it has a good NVidia graphics card and 4 USB 3.0 ports.
Note: to use a dongle and not an Internet-based license, or an Oculus Rift, you will need a powered USB hub.
You can of course use other setups, and other cameras if they are compatible with the Magewell USB dongles and if you have enough USB ports.