Installing a second NVMe SSD, now PC won't boot and just

I am looking to build a new PC with a 4090 GPU and an M2 ssd

PC The faster the drive, the faster the system boots into the OS card plugged into the slot on the board I loaded the os

m2 slot mainboard Pre-build PC Just at -* · Cooling System · DIY or Custom Cooling CORSAIR MP600 PRO LPX 2TB PCIe Gen4 x4 NVMe SSD - Optimized for PS5

m2 slot types As its not a gaming pc as 1st priority And also as a sidebonus, to keep cost down The crucial p5 500gb does not come with a heat sink