Personal computer
A personal computer (PC) is a general-purpose computer sized, priced, and built for use by one person at a time, operated directly by an end user rather than by a trained operator or a shared time-sharing terminal.[1] A typical PC combines a central processing unit (CPU), random-access memory (RAM), a motherboard, persistent storage (a hard disk drive or solid-state drive), a graphics processor (integrated into the CPU or a discrete graphics card), a power supply, and an operating system such as Windows, macOS, or Linux, together with input and output peripherals.[1] The category covers desktop towers, all-in-one machines, and portable laptops, and in common usage often refers specifically to the IBM PC compatible family running Microsoft Windows, as distinct from Apple's Mac line.[1]
In virtual reality (VR) and augmented reality (AR), the personal computer is the host machine that drives tethered, high-fidelity headsets. A class of headsets known as PC-Powered VR (also called PC VR) offloads rendering and tracking computation to a connected PC, in contrast with Standalone VR headsets that run on a built-in mobile chipset. Because a VR headset must render two high-resolution views (one per eye) at a high refresh rate, PC VR has historically depended on the discrete GPU found in a desktop or gaming laptop.[2]
Definition and components
A personal computer is distinguished from earlier mainframe and minicomputer systems by being affordable and small enough for individual ownership and by being operated directly by its user.[1] The core hardware is a CPU (a microprocessor), main memory (RAM), a motherboard that interconnects the parts, mass storage, and a display output path. Graphics can be produced by a GPU integrated into the processor or by a separate graphics card installed in an expansion slot; the discrete card is the component most relevant to demanding 3D and VR workloads.[1][2] Common form factors are the desktop, the all-in-one, and the laptop, with workstations occupying the higher-performance end of the range.[1]
History
The phrase "personal computer" predates the machines now called by that name. A 3 November 1962 New York Times article quoted John W. Mauchly predicting that "the average boy or girl" could be "master of a personal computer," and Hewlett-Packard used the term in a 1968 advertisement that called the HP 9100A programmable calculator a "personal computer."[3]
The microcomputer era opened with the Intel 4004 (1971), the first commercial microprocessor, and the Micral N (1972), an early commercial non-kit microcomputer based on the Intel 8008.[1] The machine usually credited with igniting the hobbyist market is the Altair 8800, introduced by Micro Instrumentation and Telemetry Systems (MITS) in 1974 and built around the Intel 8080; it shipped as a kit programmed by front-panel switches, with no keyboard or screen, yet sold in the thousands after its January 1975 Popular Electronics cover feature.[4] In 1977 three pre-assembled consumer machines, later called the "1977 trinity," reached the market: the Commodore PET, the Apple II, and the Tandy TRS-80.[1]
IBM entered the market with the IBM Personal Computer (model 5150), announced on 12 August 1981 at a starting price of about US$1,565. It used the Intel 8088 processor and an operating system licensed from Microsoft (sold as IBM PC DOS), and IBM built it from off-the-shelf parts with an open architecture, which let other manufacturers produce compatible "clone" machines.[1][3] Apple's Macintosh (1984) brought a mouse-driven graphical user interface to a mass-market machine.[1] Through the 1990s the IBM PC compatible standard, paired with Microsoft Windows and Intel or AMD processors, came to dominate the personal computer market.[3]
| Year | Machine | Processor | Note |
|---|---|---|---|
| 1971 | Intel 4004 | N/A (it is the chip) | First commercial microprocessor[1] |
| 1972 | Micral N | Intel 8008 | Early commercial non-kit microcomputer[1] |
| 1974 | Altair 8800 (MITS) | Intel 8080 | Kit that opened the hobbyist market[4] |
| 1977 | Apple II, Commodore PET, TRS-80 | 6502 / 6502 / Z80 | The "1977 trinity" of assembled PCs[1] |
| 1981 | IBM PC (5150) | Intel 8088 | Open architecture, ran IBM PC DOS[3] |
| 1984 | Apple Macintosh | Motorola 68000 | Mass-market mouse and graphical interface[1] |
Role in virtual and augmented reality
Tethered VR systems use the personal computer as the rendering and tracking engine. The headset acts as a stereoscopic display and a set of sensors, while the PC's CPU and GPU generate the imagery and, in many designs, run the positional tracking computation. This division is what separates PC-Powered VR from Standalone VR, where a mobile system-on-chip inside the headset does the work.[2]
Why VR is demanding on a PC
A VR frame is not a single image. The system renders two views, one for each eye, from slightly offset camera positions, which roughly doubles the geometry and shading work compared with a flat-screen game at the same settings.[2] VR also targets a high refresh rate, commonly 90 Hz or more, to reduce discomfort, so the GPU must produce both eye images many times per second.[2] NVIDIA's Turing architecture added Multi-View Rendering, which can output up to four views in a single pass; the extra views beyond two are used by wide field-of-view headsets that angle (cant) their displays, where each eye is split into additional views to limit peripheral distortion.[2] These rendering costs are the practical reason PC VR has relied on a discrete graphics card rather than integrated graphics.[2]
System requirements
When the consumer Oculus Rift launched in 2016, Oculus published a recommended PC configuration of an NVIDIA GeForce GTX 970 or AMD Radeon R9 290 graphics card, an Intel Core i5-4590 or equivalent processor, 8 GB of RAM, an HDMI 1.3 output, several USB ports, and Windows 7 SP1 or newer, stating that it intended to hold this recommended specification for the life of the product so developers had a fixed target.[5][6] Valve's system requirements for the Valve Index list a minimum of a dual-core processor with hyper-threading and a GeForce GTX 970 or Radeon RX 480, and a recommended configuration of a quad-core or better processor with a GeForce GTX 1070 or better, in both cases with 8 GB of RAM and a DisplayPort 1.2 video output.[7] The Index runs under Windows 10 and 11 and also under SteamOS and Linux.[7]
| Headset | GPU (minimum) | GPU (recommended) | CPU | RAM | Video output |
|---|---|---|---|---|---|
| Oculus Rift (2016) | GeForce GTX 1050 Ti / Radeon RX 470 | GeForce GTX 970 / Radeon R9 290 | Intel Core i5-4590 (recommended) | 8 GB | HDMI 1.3[5][6] |
| Valve Index | GeForce GTX 970 / Radeon RX 480 | GeForce GTX 1070 or better | Dual-core with hyper-threading (min); quad-core+ (rec) | 8 GB | DisplayPort 1.2[7] |
Connection methods
A wired PC VR headset connects to the PC through a video and data link. The original Rift and the Valve Index use DisplayPort (the Index requires DisplayPort 1.2) plus USB for sensors and audio.[7] Standalone headsets in the Meta Quest line can also be used as PC VR devices. Meta's wired option, Meta Quest Link (formerly Oculus Link), requires a USB-C 3.2 cable rated for at least 5 Gbps; its wireless option, Air Link, streams the rendered frames over a Wi-Fi network (Meta recommends 5 GHz). Both require a Windows PC that meets the minimum requirements and a Quest running current software.[8] Once connected, the headset can run PC VR titles through the Meta PC app or through SteamVR.[8]
SteamVR and the PC VR software stack
SteamVR, Valve's runtime built on the OpenVR API, is the main software layer through which PC VR headsets access games on the Steam store and other PC titles.[9] Valve's monthly Steam Hardware and Software Survey reports the share of PCs with a VR headset attached and the relative popularity of each model, which gives a public, repeated measurement of the PC VR installed base.[10]
Game consoles are computers that run VR but are usually treated separately from personal computers. Sony's PlayStation VR2 was designed for the PlayStation 5, yet in 2024 Sony released an official PlayStation VR2 PC adapter (launched 7 August 2024 at US$59.99) that lets the headset connect to a Windows PC through DisplayPort 1.4 and run titles in SteamVR; several PS5-specific features such as HDR, eye tracking, headset haptics, and adaptive triggers are unavailable in that PC mode.[11]
Current status in VR
As of 2026 the personal computer remains the platform for the highest-fidelity VR, while the consumer center of gravity has shifted to standalone headsets. On the Steam Hardware and Software Survey, the most common headsets among PC VR users in early 2026 were the Meta Quest 3, the Oculus Quest 2, the Meta Quest 3S, and the Valve Index; UploadVR reported that those four together accounted for roughly 80% of PC VR users.[9] The survey also showed that only a small fraction of Steam users, on the order of 1% to 2%, had a VR headset attached in early 2026, and a sharp February 2026 dip was attributed to a temporary surge in Simplified Chinese users during the Lunar New Year rather than to headsets being removed.[9] Many of the headsets counted as PC VR are Quest models being used over Link or Air Link rather than dedicated tethered units, reflecting the convergence of standalone and PC VR hardware around the same devices.[8][9]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 "Personal computer". https://en.wikipedia.org/wiki/Personal_computer.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "Turing Multi-View Rendering in VRWorks". https://developer.nvidia.com/blog/turing-multi-view-rendering-vrworks.
- ↑ 3.0 3.1 3.2 3.3 "History of personal computers". https://en.wikipedia.org/wiki/History_of_personal_computers.
- ↑ 4.0 4.1 "Altair 8800". https://en.wikipedia.org/wiki/Altair_8800.
- ↑ 5.0 5.1 "Oculus Reveals Recommended Specs For Oculus Rift, Includes Core i5-4590 And GTX 970, R9 290". 2015-05-15. https://www.tomshardware.com/news/oculus-reveals-system-requirements-rift,29111.html.
- ↑ 6.0 6.1 "Oculus Rift PC requirements revealed". https://www.pcgamer.com/oculus-rift-pc-requirements-revealed/.
- ↑ 7.0 7.1 7.2 7.3 "VALVE Index System Requirements". https://help.steampowered.com/en/faqs/view/105E-66E3-962A-1577.
- ↑ 8.0 8.1 8.2 "Set up and connect Meta Horizon Link and Air Link". https://www.meta.com/help/quest/509273027107091/.
- ↑ 9.0 9.1 9.2 9.3 "SteamVR Usage Significantly Fell February - But There's A Good Reason". 2026-03. https://www.uploadvr.com/steamvr-usage-february-2026-steam-hardware-survey/.
- ↑ "Steam Hardware and Software Survey". https://store.steampowered.com/hwsurvey/vr.
- ↑ "PlayStation VR2 players can access games on PC with adapter starting on August 7". 2024-06-03. https://blog.playstation.com/2024/06/03/playstation-vr2-players-can-access-games-on-pc-with-adapter-starting-on-august-7/.