[dukester]

Its hard to believe its a hardware limitation when the cpu usage doesnt seem to be very high with those 2820 nucs, another thing to try would be increase the memory dedicated to the GPU to something higher like 512 or even 1024 in the bios, might not do anything but it cant hurt, and yet another thing to do would be to find the Min and Max freq for the CPU and set the MIN freq alot higher and closer to the max freq, this wont let the CPU slow down so much on idle, it will use a bit more power but should still be ok, this might help also.

which april 1st build are you running?