My Windows 11 PC becomes almost completely unresponsive whenever Steam or Epic applies a large game update, or when I extract a large RAR/7-Zip archive. Task Manager shows the NVMe drive at 100% active time, and 20–30 GB updates can take hours. Small file operations are normal.
The system is about nine months old and has a Ryzen 7 9800X3D, RTX 5070 Ti, 32 GB of DDR5-6000 memory, and a single 1 TB M.2 SSD identified by Windows as SK900-1T. The drive is about 81% full, with roughly 180 GB free. CrystalDiskInfo reports 89% health, around 8% NAND wear, and no SMART errors.
CrystalDiskMark shows decent sequential reads around 1550 MB/s, but sequential write performance can fall to roughly 75 MB/s on some tests. During a smaller 2.4 GB update, the drive reached about 54°C and maintained roughly 900 MB/s, so obvious thermal throttling has not been confirmed.
Could this simply be a budget DRAM-less SSD exhausting its SLC cache during long writes, especially with Windows and the game client sharing the same drive? Or could heat, low free space, filesystem corruption, or another Windows/storage setting be involved? What should I test before replacing the drive, and would a higher-end SSD with dedicated DRAM reliably solve the problem?
2 Answers
The first easy test is to remove the side panel and aim a fan directly at the M.2 area while reproducing the problem. If the behavior changes significantly, airflow or drive temperature is part of the issue. If performance is unchanged, thermal throttling becomes less likely. Also check the SSD controller temperature rather than relying only on the general motherboard sensor.
Before buying anything, back up important data, check the SSD manufacturer's health and firmware tools, and review Event Viewer for disk, controller, or storahci errors. You can also run Windows system-file checks such as SFC from an elevated Command Prompt, although that is less likely to explain a repeatable slowdown during large writes. If the drive passes diagnostics but consistently drops to very low sustained write speeds and freezes the OS, replacing it with a better SSD is a reasonable solution.
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