Upgrade difficulties

[Igorka85]

I need some help

i have a pc with 2 nvme

Samsung 970evo+ 2tb (the main drive now) and Corsair mp500 240gb(on build it was the main drive) now is empty and i want to upgrade it to Crucial p3 4tb

The pc boots only with first 2 drives

when i remove  the corsair drive it doesn’t work or when i install the crucial drive

it works just fine only when both in place Samsung+corsair 

Z390 Designare

i9-9900k

32gb ram HyperX 2x16gb

1070gtx

[emosun]

reinstall windows with just the single drive and see if that fixes it

[Sjaakie]

Seems like the boot loader installed on the other drive than the windows installation. Reinstall with one drive connected indeed.