W WhiteG Member Joined Jun 20, 2013 Posts 8 Jun 21, 2013 #1 New to thread...and also to computer music servers. Thanks for great how-to", niemiro! Ran LatencyMon on two scenarios... 1) Using USB2.0 cable on a USB3.0 PC port feeding a USB2.0 self-powered DAC. Do NOT get any YELLOW or RED bars but reported CONCLUSION is that "Your system seems to have difficulty handling real-time audio and other tasks...One problem may be related to power management. Disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates." INTERRUPTS TO USER PROCESS LATENCIES at 1,300 are approx 4 times what they were in scenario (2) below which were reported at approx. 350. Highest TOTAL EXECUTION (ms) was about 90,000 for <nusb3xhc.sys> but am running latest driver supplied by expansion card vendor. No idea how to deal with potential BIOS issues. 2) Using (same) USB2.0 cable on a USB2.0 port (without any other devices on the buss), bars are all GREEN and reported CONCLUSION is that "Your system appears to be suitable for handling real-time audio and other tasks without dropouts." Highest TOTAL EXECUTION (ms) was about 114,000 for <USBPORT.SYS> but all Microsoft updates are current. Unclear why USB3.0 runs worse than USB2.0. Thoughts?