DirectStorage "BypassIO Not Supported" Error on Windows 11: Fix Guide
How to enable BypassIO on NVMe solid-state drives for DirectStorage 1.2 in modern games. Check filter driver conflicts and storage controller drivers.
What BypassIO Does for PC Gaming
BypassIO is the Windows storage driver feature that enables DirectStorage to read assets directly from the NVMe SSD into GPU memory with minimal CPU overhead. If BypassIO fails, asset streaming defaults to slow legacy I/O queues.
Checking BypassIO Status in Command Prompt
Open Command Prompt as Administrator and run:
fsutil bypassIo state C:\If the output reports Storage driver does not support BypassIO, update your motherboard chipset drivers and NVMe controller firmware (e.g. Samsung Magician or WD Dashboard).
Liam Zhang
Vulkan & Low-Level API Benchmark Engineer Lab Bench VerifiedAll benchmarks and crash reproductions are conducted in our controlled hardware lab across standardized AMD AM5 and Intel LGA1700 test benches using clean Windows 11 installs.