wala parin, even after switching the cables, ganun parin. the card still shuts down when using two monitors and one is at 120/144hz. pero pag parehong nasa 60hz lang walang problema. guess I'm stuck with 60hz for now
although, there has been improvement somewhat. dati mga tipong less than 5min, shutdown na. now, after removing some software that had something to do with display settings, better na. in some games, even at 144hz there were no issues anymore. kaso in other games, may issue parin, although it takes longer now before the problem crops up
so I think I can narrow down the problem to either heat or power.
FINALLY pinpointed the problem to heat. for some reason my motherboard shuts down the card at around 90+ degrees even if its still within the normal temp for the 390x. when I switched the fan to 75% (maingay na), the temps never reached 90 and no more shutdown