I just built a new PC. After installing all of the parts, I left the side panel off the case and powered her up. I looked inside to verify all of the fans were running and they were. About four seconds later though, the machine shut down. Every time I power it up, it only runs for about ten seconds or so and then shuts down.
Unless I'm missunderstanding the manual for the motherboard, I'm pretty sure it says to only hook up the 24 pin power connector although it also has a 12 volt ATX power connector too. I was going to hook that power cable up too, but I can't find one from the power supply that fits. The plug from the PSU has two parts that are square and two parts that are shaped like houses. This is the same for the connector on the MB, but the squares are where the houses should be and the houses are where the squares should be. I know that description of houses and squars sounds strange, but if you've ever built a machine before, you'll probably know exactly what I'm talking about.
So, what do you think? Do I need the 24 pin connector AND the 12 volt connector?
MB is ASUS M2N-SLI Deluxe AM2 NVIDIA nForce 570 SLI MCP ATX AMD.
PSU is Rosewill RP550V2-D-SL-S ATX12V v2.01 550W Power Supply.