[Help] x399 boot loop

[Ceta]

Im a high school kid who is pretty new to PC building (one system built so far) and i recently went all in and bought some stuff off ebay (incredible dealz). I bought a X399 Aorus Gaming 7 mobo ($200), threadripper 1920x ($437 Brand new never opened :0), 16gb corsair vengeance RGB ddr4 3000 ($160) , along with a 512gb nvme ssd and 1tb hdd (both of which i got for pretty cheap and do not remember the prices of), and a super basic AMD graphics card which i found lying around and am only using as a hdmi output for the time being. This PC is a labor of love for me and is causing me some problems. when i recived my mobo and CPU (the last pieces to arrive) i spent a little time putting it together and making sure that i followed instructions perfectly, however when i went to boot the system for the first time with everything connected i was met with a strange Boot Loop. The PC would light up for a split second (RGB goodness) but all the lights would soon flash off and the small error code light would flash multiple codes in quick succession (pretty much too fast to read) then all the fans would turn off. Currently i have the 24 pin and the 8 pin PSU cables from my 750w psu plugged in but i left the extra 4 pin plug unconnected because it is supposedly optional and only should be used for extreme overclocking. the small status LED for the CPU lights up when i power on the system indicating that the problem might be with the CPU, i have tried reseating the CPU multiple times and inspecting the socket for any damage (i found none) and even reseating the AIO cooler but to no avail, i ask you.. oH wise computer gods, pls help me figure out what is going on with my baby boi.

 

with bated breath

-Ceta