Hi guys, retaking this thread I'm having same problem here meanwhile sonar x2 producer is playing...i mean that while a song is playing and i move a pattern glitching appears under wdm or asio. The latency have to go above 1024 to save that counting that i have nothing in the project but 6 audio takes is too much. I've been having a look through latencymon and usbport is peaking the thing but only with sonar!!!, normally i have 200 microseconds which is perfect...I turned down all power options, windows and bios, optimized the pci bio settings and turned off serial ports, hard disks running under ahci... installing a usb pci would solve the problem?? Any idea??