new build hiccups

friends, well getting to be more like large burps at this point.. new build that took a bit to get going but then ran great (passmark 6504) for a week plus.. seems like issues came back after i tried running three monitors off my gpu.. went to bsod after that.. has always showed some debug codes, now showing many.. wouldn't post for a couple of days; pulled cpu and reset, went down to one stick of ram, ended up starting up to windows 10 out of the blue.. went to start up again the next day and no post again.. have set cmos via jumper method many times now.. have unplugged everything but cpu and one ram.. starts up, shuts down and restarts after 20 seconds, tries it again and again.. too many debug codes (33, 7a, 36, 27, 69 and others that go by too fast to read.. had just reset the cpu again a bit ago and one stick ram, showed no codes but also wouldn't post.. at start of build did have a bent pin on the cpu but fixed that easily and it worked after that.. it's weird to try many things and no post, then try it again and it went to windows and worked for a day; now won't post again.. nothing seems consistent.. i've followed most suggestions for this from forum posts; but nothing seems to help.. any ideas on which direction i should take this?? any help appreciated..
ryzen 3700x, asrock x470 taichi, 32gb corsair dominator 3200 c16 @ 2666, evga 280 clc, evga gtx 1660 sc, evga 750 g2 psu (only thing not new but worked in old computer) samsung 970 evo plus 500gb m2...