I have an Asus Rampage III Formula LGA 1366, it's been running for about 2 years without issue. This past weekend it my system shut off randomly while idling. Attempted a reboot and it refused to post, after re-seating the RAM and both of my GTX 460 cards it posted and came back up fine. Later it happened again while practically Idling.
The motherboard won't post, no red idicator lights specifying which piece it has an issue with. Both cards don't get power when turned on but all the case fans spin and HDD lights on the motherboard come up.
After first I thought it was some bad RAM, but now I'm thinking it's the motherboard.