Why does my Windows 11 SSD randomly hit 100% active time and freeze?

I’d troubleshoot the physical and controller path before changing random Windows settings. Try a different SATA data cable, another motherboard SATA port, and confirm the drive is connected to a chipset-controlled port. Check the motherboard BIOS for AHCI mode and install the latest chipset/storage firmware available from the board and SSD manufacturers. Event Viewer may also show disk, storahci, or controller resets around the time of a freeze.

Power-management settings are worth testing, but I would treat them as a diagnostic step rather than the first permanent fix. Temporarily use a high-performance power plan and disable Link State Power Management to see whether the pauses stop. If that changes nothing, re-enable it and focus on SATA cables, firmware, controller errors, and the SSD itself. Avoid making BIOS or storage changes without a current backup.

A healthy CrystalDiskInfo result mainly means the reported SMART indicators have not crossed warning thresholds; it does not guarantee that the drive performs well under latency or sustained random access. Update the SSD firmware and run the manufacturer’s diagnostic or extended test. Also leave some free space on the drive, since an almost-full SATA SSD can become much slower during garbage collection.

The RAM numbers make swapping unlikely in this case: 32 GB with only about 8 GB in use should not normally cause paging severe enough to explain this. You can still confirm by watching the Memory and Disk sections in Resource Monitor. If the system drive is the only device showing long response times and moving Windows to an inexpensive M.2 SSD makes the problem disappear, replacing the older SATA drive is a reasonable practical fix.

100% active time does not necessarily mean the drive is transferring lots of data. It can mean the SSD is spending nearly all its time handling a request, so low or zero MB/s during the spike points more toward high latency than heavy workload. A DRAM-less or older SATA SSD can struggle with Windows background activity, especially random reads and writes, but that alone does not prove the drive is defective. Check Resource Monitor’s Disk tab while it happens and note which process, file, and response time are involved.