3930k loses power to usb keyboard during post and at random times

[idata]

this is on a brand new EVGA x79FTW board with 16 gigs of corsair dominator ram. this is the second board to do the exact same things. while booting in it will see the keyboard connect it and then drop the connection, which does not allow me to enter bios. the only way to get into bios is to disconnect the hard drives and when I get the no hard drive error in bios hit f1 then I can enter bios.

I have tried 3 differnet PSU all over 1000 watts gold certified

4 keyboards

3 mice

2 sets of ram on vengeance and one dominator

disconnected all peripherals

different GPUs

3 different solid state hard drives

replaced all the cables in the box

if I try to run prime 95 the cpu temperature goes to 50c and warning tone is emitted from the MB

since the processor is the only thing I have not changed I am leaning towards that to be the culprit

[Adolfo_S_Intel2]

The issue that you are reporting does not seem to be related to the processor, however since you report that you have changed all other components, I would suggest testing another processor, on your motherboard, to see if it causes the same behavior.

If the issue actually follows the processor, then please go ahead and contact the Intel Customer Support center on your location. You can find the contact information at:

http://www.intel.com/support/9089.htm http://www.intel.com/support/9089.htm

[RGiff]

If you are getting a warning tone at 50C I would you have a bad sensor on the MOMBO.

[RGiff]

can you get it running long enough to use CPUz to see real time volts ?