i5-2500K (oc'ed turbo boost to 4.4ghz)
Thermalright Ultra 120 Extreme
G.Skill DDR3 1600 (2 x 4gb)
P8P67 PRO (rev3) --> P8Z68-V/GEN3
Probably not exactly thinking straight after spending a sleepless night trying to decipher this issue, but I'll try my best to explain in hopes that one of you has the answer...
Woke up yesterday and my desktop had shut itself off during the night (had left it up to convert a video for eventual youtube upload). Hitting power results in a quick 1/2 second spin of the fans, blinking of the CPU & MEMOK LEDs, and then nothing until the PSU is switched off and on again. Went through all the usual troubleshooting steps (disconnect all drives / cards, reset CMOS, take out battery, reseat CPU/RAM, boot with just one DIMM... though a bit cynically, since this system had been running fine for almost a year) and hit up the interwebs to see post upon post of dead P8P67s, most disturbingly: http://www.techpowerup.com/forums/showthread.php?t=153835
Went out to Microcenter and picked up a P8Z68-V/GEN3 as a replacement to try out -- hooked it all up and this time had power to fans/drives. CPU_LED blinks red momentarily and clears, followed by the MEMOK_LED, which stays solid red. No amount of CMOS clears / RAM reseats / MEMOK button pressed resolved the issue... so I tried another stick of DDR3 from a working system and had the same problem, so I ruled out memory. Maybe my Corsair PSU's on its last legs... (~5 years now)?
This one's got me stumped as to what it could be -- my gut is saying it's the processor [doesn't help that there's plenty of threads out there with people describing dead 2600ks from P8P67s], but I don't have another one on-hand to try (and returning a CPU to Microcenter is a nightmare). Heading back out to Microcenter again today... and wondering if I should:
a) Swap the motherboard for another P8Z68-V/GEN3 in case I just got a lemon?
b) Pick up a (gulp) 2500K in case my current one is dead?
c) Forget the Asus boards and get something else?
Any help/advice is greatly appreciated -- many thanks in advance.