So, like the thread title says: my power-horse computer died because it's PSU just exploded.
Wifey was using the Windows 7 calculator when suddenly i heard a LOUD sound (i was in the next room and i sounded like something heavy felt into the floor); came right fast and saw, for my horror, lots of white smoke coming from every vent of the case...
i immediately check what happened (i asked wifey if she divided by zero ) and saw electrolytic liquid everywhere in the mainboard, cpu heatsinker, case plexiglass window (checked the PSU and it was still hot and had the power filter capacitor blown off - it was an OCZ SteathXstreamer 600W)..
i've spend the whole afternoon cleaning the case, the mainboard and everything to ensure there was not a single bit of electrolytic fluid laying around.
so finally i've powered on the mainboard (Asus M4A89GTD Pro) because i had an extra PSU hanging around (Corsair CS600W; just tested last month, working great) but only the green LED turns on; if i power on the button the CPU fan turns on and them OFF, while the mainboard Green LED is still on.
i've removed everything (ssd, memories, gfx card, etc.), just left the psu connected to the mainboard and still the same symthoms; CPU fan turns on then off in just a couple of seconds.
i think the mainboard is dead; hopefully it's just the PSU and the mainboard, because if it was the HDDs/SSDs, CPU and gfx card...it's gonna be expensive to fix.
btw: no warranty as i had that PSU since 2008 (almost sure) and the whole system i built in 2010.