Hi there,
the temps you are getting on the 1090T are about right for it especially if you are using the stock cooler and there is usually a difference between the readings in BIOS and software so you don't have too much to worry about that. The reason for the difference is the way the BIOS is reading the processors actual temp and the software usually reads the core temps.That's the good news!
The bad news is that there is no real control via the motherboard for the CPU Fan speed control and I'm not really sure if EasyTune will let you pull the speed of the fan back to make it quieter. I had similar issues on the GA-890FXA-UD5 and resorted to investing in a decent third party cooler as the stock AMD fan was way to noisy but, that comes at a price.