Solving WD SN850X 1TB latency in Space Marine 2
Right when I'm charging into a swarm of Tyranids, the game just freezes for about 2 seconds. In a game this fast, that's an eternity and totally kills the flow. I found that the SN850X keeps dipping into low-power states by default, causing response times to swing wildly between 10ms and 45ms. I tried swapping M.2 slots—trying both the CPU-direct and chipset lanes—but the lag persisted, which was honestly pretty discouraging. I finally went into the BIOS and completely nuked the NVMe power-saving mode and forced the PCIe link to Gen4 High Performance. Using a latency tester, my response times dropped from a shaky 15-40ms to a rock-solid 2-5ms. Disabling power saving broke my Windows sleep mode at first, but a quick tweak to the power plan fixed it. SSD temps are 48-55℃, and the data streaming is finally perfectly synced at 2-5ms.
