Have a build that has been running great for about a month now with a single 1tb drive. I just put in a second one and ran the https://www.userbenchmark.com/ test and my primary drive dropped considerably in sequential write speeds (everything else was untouched) Build Details: Gigabyte X570 AORUS PRO WIFI Ryzen 3700x G.SKILL F4 DDR4 3600 C16 2x16GB GIGABYTE GeForce RTX 2070 Super GAMING OC 3X 8G 2 x Sabrent Rocket Q 1TB NVMe PCIe M.2 2280 Internal SSD High Performance Solid State Drive R/W 3200/2000MB/s (SB-RKTQ-1TB) Drive C: (placed in the M2A Slot) has been benchmarking at 1700 MBps sustained write speeds until today. Now it is showing at 200 MBps. Drive D: (M2B slot) is humming along just fine at 1700. Doesnt seem to affect any of the random write speeds so I'm unlikely to actually notice this in my day to day but the drop from a "UFO" class desktop to a "Nuclear Submarine" has hurt me right in the feels. Drivers are up to date. Any help would be appreciated.