Knowing what your hardware is doing in real time helps you diagnose slowdowns, overheating, and performance bottlenecks. You do not need expensive software — the tools are already on your machine.
1. CPU usage and temperature
Open Task Manager (Ctrl + Shift + Esc) and click the Performance tab. Select CPU to see real-time usage percentage, clock speed, and the number of active threads. The temperature is not shown in Task Manager, but you can use our CPU Benchmark to stress the processor while checking frequency behavior.
When you see clock speed drop under load, the CPU is thermal-throttling — running hot enough to reduce its own speed. Check the overheating guide for next steps.
2. GPU usage and VRAM
In Task Manager’s Performance tab, select GPU to see utilization, dedicated memory usage, and shared memory usage. If GPU utilization hits 100% while gaming but FPS is lower than expected, your graphics card is fully taxed.
Use our GPU / WebGL Test to push the GPU in-browser and see how your system handles WebGL rendering.
3. FPS in games
Most games have a built-in FPS counter in their settings. For games that do not, the Xbox Game Bar (Win + G) includes a performance overlay that shows FPS, CPU, and GPU usage. Press Win + G, then add the Performance widget from the toolbar.
For browser-based tools and games, our Refresh Rate & FPS Test shows your real-time frame rate alongside your monitor’s refresh rate.
4. Storage activity
Storage is a common bottleneck. In Task Manager’s Performance tab, select your drive. Watch the “Active time” percentage and read/write speed. If active time is at 100% while read speed is below expected levels, the drive is struggling — common with near-full drives or old hard drives.
5. Network usage
In the same Performance tab, select Wi-Fi or Ethernet to see real-time send and receive speeds. This is useful for spotting background updates consuming bandwidth. Our Network Speed Test measures download, upload, and latency if you want a comprehensive check.
6. Record your baseline
Note your CPU idle temperature, GPU idle usage, and idle RAM usage when the system is fresh. Compare these numbers when the system feels slow — an idle CPU at 60°C instead of 35°C, or idle RAM at 70% instead of 30%, points to a problem immediately.
The bottom line
Task Manager covers CPU, GPU, RAM, storage, and network. Add the CPU Benchmark, GPU Test, and Refresh Rate & FPS Test for browser-based stress and measurement. A baseline set of numbers makes future troubleshooting instant.