Slowing down over time has two different meanings: slower over months of ownership, and slower over minutes of heavy work. They have different causes and different checks.
- Over months, the usual reasons are more programs starting with the machine, a fuller drive, heavier software and browser pages, and dust in the cooling path.
- Over minutes, the machine is falling from the level it reached early in the work. SystemCheck measures that shape as settled decay; it cannot see the cause from a browser.
- A run saved today is a baseline. The same test on the same machine months later shows whether its sustained level has actually moved, or only how it feels.
The short answer
A computer's processor does not get slower with age in normal use. What changes is what it is asked to carry and how well it is cooled: more software starting with it, a fuller drive, heavier web pages and updates, and dust or dried paste in the cooling path. The first group makes the machine feel slow at any moment; the cooling group makes it slow down after a few minutes of heavy work.
Slower over months
Start with what runs before you do anything. Programs that add themselves to startup, sync clients, updaters and security tools all take memory and processor time in the background. Task Manager on Windows (Startup apps) and Login Items on a Mac list them.
Then the drive. A drive that is nearly full leaves the system less room for its page file, caches and updates. Freeing space and removing programs you no longer use is the cheapest check there is.
Last, the work itself has grown. Browsers, office suites and games ask more of the same hardware every year, so a machine that was comfortable when new can be stretched by the same tasks today.
Slower over minutes
If the machine is fine at first and slows down after a few minutes of a game, an export or a compile, the question is whether it can hold its level under sustained load. A stress test answers that by running steady work and recording the throughput second by second.
SystemCheck's CPU stage shows a short boost step apart and scores only what the machine loses after it settles, which it calls settled decay. A web page sees no temperature, clock or power reading, so the report describes the shape and names the causes it is consistent with; a sensor tool such as HWiNFO confirms which one it is.
- Flat after the boost step: the machine holds its level, so look at background software and storage first.
- A steady fall after it settles: consistent with heat building up, among other causes. Cleaning the vents and checking the fan come first.
- Slow from the first second: consistent with a power plan, battery power or background load, rather than heat.
Keep a baseline
Feel is a poor measuring instrument. Save a report while the machine is in a state you are happy with, then run the same mode again when it feels slow. If the sustained figures match within their intervals, the hardware is doing what it did, and the change is in software or expectations.
Terms used here
Questions
- Do processors wear out and get slower?
- Not in a way you would notice in normal use. A processor runs at the speed its firmware allows for the conditions. What changes over time is the load and the cooling around it.
- Can SystemCheck tell me why my PC is slow?
- It can tell you whether the machine holds its level under sustained load and what shape its curve has. It cannot read temperatures, clocks or startup programs from a browser, so it names what the shape is consistent with and leaves confirmation to a sensor tool.