An anonymous reader writes: Powerful virtual reality headsets like the Oculus Rift and HTC Vive require powerful PCs with beefy graphics cards to operate. That means you'll usually be tethered to a PC tower in your home. Well, HP and MSI have announced portable 'backpack PCs' designed to be used with high-end virtual reality headsets. These PC internals are built in a backpack enclosure powered by a large battery pack. The HP Omen X weighs less than 10 pounds and has a battery that's big enough to last for up to one hour of gameplay, but you do have the option of swapping out the batteries for uninterrupted VR. Specs include either an Intel Core i5 or i7 processor, up to 32GB of RAM, and at least an Nvidia GTX 970 or AMD R9 290 or higher. The MSI Backpack PC features an Intel Core i7 processor and Nvidia GTX 980 graphics, according to the company. The last of the backpack PC trio is the Zotac Mobile VR. The company hasn't released any specs of the product but the company did state in a blog post, "This mobile solution not only removes the bulk of connecting to the large traditional computer towers of old, but also allows the user to roam freely in VR with their undivided attention. This innovative solution includes a system powerful enough to drive VR, and a portable battery pack to keep you going." There is no pricing or availability information as of yet.