Ok guys... it seems I found out what's going on with my system. Let's begin with "no, it is not an hardware fault"... well, mostly it isn't. I tried replacing my PSU but it did not fix the hang-ups. I also tried to switch distro (from Funtoo to Gentoo and then some LiveUSB distros) but nothing seemed to help (I thought about the opensource radeon driver locking the system and with Funtoo I was not able to install fglrx). Then, this morning a lightning stroke me and I was like: "let's try to clear the CMOS"... well it did not help but I noticed one thing: the mobo did not recognized the RAM timings and voltage correctly! I had to activate some ASUS thing called "D.O.C.P." and voil?... I get the right profile in the preferences and the system is rock solid since then... it's even f*cking faster! My Kingston kit is even in the damned QVL... WAY TO GO ASUS! :angry:
I was like this the whole morning:
EDIT: just to be clear. My RAM supports both JEDEC (standard) and XMP but the former is DDR3-1600 11-11-11 @1.5V and the latter is DDR3-1600 9-9-9 @1.65V. The BIOS set this profile: DDR3-1333 JEDEC 9-9-9-28 @ 1.5V. WTF?!?