I had 3-way GTX 670's but decided I didn't like the PCI-E 2.0 bottleneck so I traded one of my cards for a 3930K. Last night. I pulled the 3 cards on water out, installed the air cooler on the one I was trading and tested it to make sure all was well. Everything went great and I was playing BF3 online without a problem.
Today I went to reinstall the other two cards in my system and fill the loop up. Installed everything, leak checked it, everything looked fine so I hit the power button. It started up long enough to light up all the red fan lights and spin up the fans and then immediately powered off. It will not stay on for more than 1 ... 2 seconds at most.
Long story short, things I have tried that have yielded the exact same result:
-- Install old GTX 570
-- Remove CPU block and CPU, clean CPU, reapply thermal paste and remount CPU and block
-- Unplug hard drive
-- Take a spare PSU that is also Seasonic, remove the 24-pin and 8-pin plugs out of my X-1250 and plug them into the spare X-750 that for sure works. Also plugged water pump directly into mobo. Removed graphics card but left sata devices plugged in but unpowered. Only 3 things were plugged in power wise: 24-pin, 8-pin, and pump direct to mobo. Same result. Powers off immediately.
I know my pump works fine because I used the X-750 in the second machine to power my pump for filling the loop and leak testing not minutes before I tried it in my machine.
That means that either the mobo took a dump on me or my CPU somehow went bad. What do you guys think? I'm sure it has to be the motherboard. Those are the only two possible parts left that it could be. I just have no idea why it would happen right when I make a hardware switch
Should I contact Asus tech support?
I hope it is the motherboard as I have the 3930K on the way and a shiny new Rampage IV Formula to go with it. I was going to RMA the Maximus IV Extreme anyways because the USB devices refuse to stay connected so hopefully it is again the board causing this problem.