PC not booting/boot looping when a hard drive is connected

[A_Random_Weeb]

I’ve recently bought a second hand hard drive off of a local online store and now that I’ve installed it to my PC, the PC won’t start unless I disconnect the drive from SATA. After about 5-8 restarts I got into my PC and HDD Sentinel found the drive and it had about 2300 days of up-time and 93% health, but windows disk management labels the drive as “Unknown” and I can’t initialize nor make it go online. After restarting my PC again, it had the same problem of not rebooting and boot looping. Also when I first booted the PC, I went to the BIOS and saw that my RAM had been set back to 2400mhz instead of 3200mhz, is this because of me removing the GPU(since I rerouted a SATA cable that’s behind the said GPU)?

Thanks in advance.

[Bruce]

changing components should not change BIOS memory speeds. (unless it’s the RAM being changed!)
second hand hard drives are never a good idea unless you can personally vouch for the history.
they are cheap enough to buy new anyway.
plus your storage device is the last thing you want to have question marks over.

I’d be taking the unit back and getting a refund.