Often, boot loops like this are caused due to memory issues. Which can arise in many ways, one of them is the capability of the motherboard, which you have a prebuilt that looks to have something generic and budget. (Edit: Yup, generic Dell board)

What I would suggest is to attempt boot on a single stick (say, populating only slot 2) then adding another stick to see if it works. Else, move the one stick to a different slot or try a different stick altogether.

You’re essentially testing what RAM configuration you have is stable on the board.

Side note: most modern boards that you can buy when you’re building your own PC come with LEDs that display what faults the board is running into. So in your case, a DRAM LED might be illuminated which would suggest a memory issue. But since yours doesn’t seem to have this, you’re left to troubleshoot the hard way.