High USBPORT.SYS and dxgkrnl.sys DPC Latency

[deakz]

Hi, im new to this forum. And i hope i can get some help.

I have high dpc on the usbport.sys, and it really bothers me since the audio just sounds wrong or delayed rather.

I want to know what is wrong with my setup so i can fix it.

Intel i5 3570K
Corsair 9-9-9-24 1600Mhz 8GB
NVIDIA GeForce 770GTX
Samsung EVO 840 SSD 120GB
WDC 3TB SATA
Shuttle Z77R5 (i know, this motherboard might be the issue, but i want to be certain)

Razer Blackwidow 2014 Keyboard
Razer DeathAdder 2013 Mouse
Steelseries 5H - With a USB soundcard (A sennheiser usb soundcard) (This might be the issue aswell)

Ive seen around here on the forums about xperf, ive done that, and with the default program on Windows 8.1 to analyze it, but i dont know how to use it fully. I dont know how to diagnose the problem myself, so im turning to you experts.

Line #	Module	Function	Count (Fragments)	Duration (Fragmented) (ms)	Duration (Fragmented) (ms)	% Duration (Fragmented)	Fragment Enter Time (s)	Fragment Exit Time (s)	Exclusive Duration (ms)	Duration (Fragmented) (ms)
1	USBPORT.SYS	?	876000	0,333841	0,008880	1,82	44,603062190	151,379731013	0,333841	7778,945950

Overtime it gets bigger and bigger, also

Line #	Module	Function	Count (Fragments)	Duration (Fragmented) (ms)	Duration (Fragmented) (ms)	% Duration (Fragmented)	Fragment Enter Time (s)	Fragment Exit Time (s)	Exclusive Duration (ms)	Duration (Fragmented) (ms)
2	dxgkrnl.sys	?	156063	0,115238	0,016400	0,60	44,979095387	151,374355120	0,115238	2559,441373

the nvidiakrnl also seems quite high.

Line #	Module	Function	Count (Fragments)	Duration (Fragmented) (ms)	Duration (Fragmented) (ms)	% Duration (Fragmented)	Fragment Enter Time (s)	Fragment Exit Time (s)	Exclusive Duration (ms)	Duration (Fragmented) (ms)
3	nvlddmkm.sys	?	96325	0,309327	0,004345	0,10	44,979142181	151,374357495	0,319314	418,552165

Im not a 100% sure if i got it right.

I can post the .etl when someone wants it.

Im thankful for any help i can get.