Delta is a company and you know if you have one if this sticker on the fan-
Model number varys.
Check temps with core temp, google it and it should come up.
A simple way to tell if fan is making your noise is to simply stop the fan. Put your finger on the hub of the fan and stop it; if the fan is making the noise then the nise will stop. You can do this for all of the fans in the case including the PSU fan.