I'm having serious boot loop and power on issues with my UP5. Tried 4 different BIOSes including beta, stock values, no XMP, one stick of RAM etc. Sometimes it doesn't boot at all and I have to physically reset the BIOS using a jumper (not even the clear CMOS works). Sending the machine to sleep (standby) sometimes works, sometimes it never comes back on, sometimes it never actually goes to sleep (hard drives and fans are off but the SSD remains on and powering it back on results in boot loop).
This is the second UP5 board that does this.
I'm not willing to exchange the RAM (didn't have any such issues n ASUS mobos). I like everything else about the UP5 but not being able to trust its sleep/standby and it refusing to power on sometimes is a no go for me, even though it was a steal for 169 GBP at Amazon (the first was unsealed though, maybe these cheap ones are refurbished, not properly re-tested)
If nobody knows a fix then I may have to go back to an asus maximus v gene -- I so hate the lack of video outputs on the MVG though.