Guide
An overlay disappears when you need it and Task Manager is on the screen you are using. A second display solves both, and the awkward part is not the display — it is getting at the sensors.
CPU temperature and package power are not ordinary Windows metrics. They live in model-specific registers on the processor and on the motherboard's Super I/O chip, and reading them means loading a kernel-mode driver. Any tool that shows you a real CPU temperature is doing this, which is why every one of them asks for elevation.
The consequence is worth knowing: run the same tool without administrator rights and it does not fail loudly. It shows the readings it can get — load, memory, GPU — and simply leaves temperature blank, which looks like a bug and is not.
GPU temperature is different and easier. NVIDIA and AMD both expose it through their normal user-mode driver interfaces, so it works without elevation.
| Reading | Why it earns the space |
|---|---|
| CPU temperature | The one that throttles first under sustained load |
| CPU package power | Shows a power limit being hit before heat does |
| GPU temperature and load | The pair that explains a frame-rate drop |
| GPU memory used | The quiet cause of stutter at high texture settings |
| RAM in use | Worth watching only if something is leaking |
| Fan speed | Mostly confirms what the temperature already said |
Everything else — per-core frequencies, a dozen voltage rails — is interesting when you are diagnosing something and noise the rest of the time. A glance display holds about six numbers before it stops being a glance.
Modern parts are designed to run warm. A desktop CPU sitting at 80 °C under a long render is working as intended; the number that matters is whether it is throttling, which shows up as clock speed falling while load stays high. Sustained 95 °C-plus with the fans at maximum is worth investigating. A brief spike to 90 °C when a build starts is not.
A 1920×480 panel fits roughly six tiles across at a size readable from arm's length. That is enough for the six rows in the table above with room for a clock — and it is the right amount, because the value of a glance display collapses as soon as you have to search it.
Two practical notes. Set the thing to stay visible when a game takes the main screen, or it will vanish exactly when you wanted it. And if the panel sits above your keyboard, put the pointer-blocking option on: a mouse that can wander onto a screen you never click is a small, permanent annoyance.
TinyScreen is a dashboard built for exactly this shape of screen — hardware readings, what is playing, incoming messages, and Claude Code usage, laid out for 1920×480 rather than squeezed into it.