sysadmins

Windows Server 2025 now supports native NVMe I/O, moving away from SCSI bus commands. This feature requires a registry key modification or group policy MSI to activate. Users can see performance improvements of up to 80% in IOPS and a 45% reduction in CPU utilization during high I/O loads. Testing on a two-socket Intel system with 208 logical cores and a Solidigm D7-PS1010 SSD showed a 45% increase in IOPS with one thread, 78% with eight threads, and 71% with 16 threads, alongside a 41% and 47% decrease in CPU load during 4K random reads with eight and 16 threads, respectively. The I/O processing workflow has been redesigned for better performance, enhancing overall latency and responsiveness. Community feedback is mixed, with some users experiencing negligible differences and others suggesting that only PCIe 5.0 NVMe devices can fully utilize the new I/O stack. There is no timeline for this feature's rollout to Windows 11, and its effectiveness may vary based on drive firmware quality. Home computing tasks may not see significant improvements, but multitasking and gaming experiences could benefit from reduced CPU load and improved system responsiveness.