How Many Dead Pixels Are Acceptable on a Monitor
Under ISO pixel class II a 4K monitor can have about 16 bright pixels and still pass. What the standard allows at each resolution and what brands promise.
An online proctored exam can be lost before the first question: the system check fails, the camera is refused, or the connection drops at check-in. Almost every one of those failures can be found and fixed days earlier, because the requirements are published and most of them can be measured at home.
8 min read · updated 25 September 2026 · links to 5 tools
These are the candidate requirements from Pearson VUE's OnVUE technical requirements document, version 26.7.1, dated July 2026. Pearson VUE notes that minimum requirements may change as exam sponsors update their needs, so check the current version for your exam before relying on any figure.
| Part | Requirement | Can you check it at home? |
|---|---|---|
| Webcam | At least 640 × 480 at 10 fps; facing forward at eye level, showing head and shoulders; no filters; not a mobile phone | Yes — resolution and frame rate |
| Internet | At least 6 Mbps download and 2 Mbps upload; wired recommended; no VPN or proxy | Yes — with a speed test |
| Speakers | Built-in or wired; no Bluetooth | Yes |
| Headphones | Not allowed unless the sponsor approves them; if allowed, wired only | Check your exam's rules |
| Display | At least 1024 × 768; one monitor only; no touch screens | Yes — resolution |
| Operating system | Windows 10 or 11, 64-bit, not in S Mode; macOS 14 or later, not a beta | Yes |
| Memory | The operating system's minimum; 4 GB or more recommended | Yes |
| Power | Plugged in before the exam starts | Yes |
The resolution and frame-rate minimum is low — 640 × 480 at 10 frames per second is well below what almost any laptop camera offers — so failures are rarely about the camera's specification. They come from what the camera actually delivers. In poor light many webcams slow their frame rate to gather more light per frame, and a camera that another program is already using may refuse to start at all.
Measure what your camera delivers, not what it promises. The webcam test reports the resolution the browser actually received and the frame rate it is really delivering, so a dim room that drags the camera down is visible before exam day. Test in the room and the light you will use for the exam.
Position matters as much as the numbers. The camera must face forward at eye level and show your head and shoulders, placed directly in front of you rather than at an angle, and camera filters, including Apple's Reactions, are not allowed. If you use an external monitor, the document says to close the laptop and use an external keyboard, mouse and webcam.
Speakers must be built into the computer or wired. Bluetooth speakers are not allowed, and neither are headphones used as speakers. Headphones and headsets are not allowed at all unless your exam sponsor has approved them, and if they are approved they must be wired.
Check the microphone picks up your voice at a sensible level with the microphone test, and that sound comes out of the built-in or wired speakers with the speaker test. On a Mac, the document notes that OnVUE may need to be allowed to use the microphone and camera in System Settings, under Privacy; if you choose Don't Allow the first time, it will not ask again.
The minimum is 6 Mbps download and 2 Mbps upload. Upload is the figure people forget, and it matters most here, because your camera is sending video to the proctor for the whole exam. Many home connections have far less upload than download.
Run a speed test at the time of day you will sit the exam, on the same connection. Pearson VUE recommends a wired connection instead of Wi-Fi, asks you to stop others at home using the internet during the exam, and does not allow VPNs or proxies. Corporate networks and corporate computers often have restrictions that block delivery, so a personal computer on a home connection is the safer choice.
The display must be at least 1024 × 768, and 1920 × 1080 or higher is recommended. Only one monitor is allowed, and touch screens are not allowed. The screen resolution checker shows the resolution and scaling your screen is running at.
The supported systems are 64-bit Windows 10 and 11, excluding S Mode, and macOS 14 or later, excluding beta versions. Windows 8.1 and earlier, Linux and Chrome-based systems are not supported, and Windows must pass Pearson VUE's Genuine Windows check. Tablets are not allowed unless they have a physical keyboard and meet the operating system requirements.
A browser test measures your camera, microphone and screen as the browser sees them, which is the right way to find a hardware or lighting problem early. It cannot run Pearson VUE's own checks, such as the Genuine Windows validation or the secure browser's rules about which other software may run. Only the official system test can tell you that your setup will be accepted, so use the independent tests to find and fix problems, and the official test to confirm.
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