I close off PSM completely and restart it. If not work I restart the computer, but PSM usually work when you restart it.
16Gig of ram
2x 512Gig of HDD
1 Gigabit LAN line
1000 base full band
HDMI to Denon AVR-4311CI to Samung un55ES7100 (Calibrated with X-Rite i1Pro Enhanced from Spectracal)