This message was posted on behalf of Intel Corporation
To answer your first question, in order to try to fix this problem, you can try the following:
Try a BIOS update to the latest version, you will need to check with ASUS directly about how to do that.
ASUS support site: http://www.asus.com/support/
ASUS support phone numbers: http://www.asus.com/us/support/CallUs
Reinstall the drivers, specially the graphics drives, that in this case will belong to the video card, since the graphics of the processor are not being used, when you have a video card
Also, to rule out a problem with the video card itself, if you have the option of course, to test it with a different video card or to test it without a video card.
Also, to test it with just one memory stick, with all the sticks, in order to rule out a possible memory problem
Since you already replace all the components, except the processor, that indicates that it could be a problem with it, but if you have the option to test a different processor on that same board, we will be able to confirm that.
Besides that, this could be a problem with the processor itself, so, yes, to answer your second question, you do have 3 years of warranty and we can replace it for you.
In order to do that, please get in contact directly with us through chat, email online support or phone support, here is the link to do that: