Okay gotcha. Also wondering as everytime i ask a question and its answered, whether i understand it or not is the question . 1. Okay to the point, should i leave the other devices at default if i never set them to High priority or should i set them to Normal, low in that order... So far I've changed all 4 of these devices i require the most to High Priority and i like the feeling and am trying to continuously figure out whether below is a better way of achieving lower input lag/DPC for certain devices in a proper right way. More defined understanding: NOTE:** I have 7 devices total, *NIC, *Nvidia drivers, *XHCI, *AHCI Controller, *Two HD AUDIO controllers, *Intel MEI Either i could leave it as high priority for all of my 4 devices i have listed said above. Either list all the 4 devices in High Priority, normal and low priority & not reuse any of the other priorities... (Q: Should i ever use low priority for a device i care to for in priority if i leave all the others at default?) Either i list all 4 devices as such, XHCI & Nvidia in High Priority, and NIC and AHCI in normal and the unlisted can be left on low or default? 2. Also questions arise once again, if i set any of these with some type of value, what other system or anything on the OS level or such require interrupts? Everything requires interrupts, correct? So in essence, leaving anything on high, normal might incur dpc for other "Stuff" (don't know what to call these stuff) like OS, wdf01000.sys and anything else in there. 3. What does undefined truly mean? Does that just mean Normal?