I have just bought this motherboard ( Newegg.com - MSI P6N SLI-FI LGA 775 NVIDIA nForce 650i SLI ATX Intel Motherboard - Retail ) with the following products correctly installed: 2x2GB (4GB) G.SKILL DDR2 800 (PC6400) RAM, Cooler Master eXtreme Power 550W, BFG Tech 8500GT 256 GDDR2 PCI-E 16x, Pentium D 925 Presler 3.0GHZ FSB 800, and a Samsung SATA DVD Burner. Also, this board uses 2 PATA Hard drives (one slave, one master) connected to the motherboard's HDD slot. After connecting all these parts and pressing the power button, the computer would not power up. The motherboard has an 8-pin slot in it for the cpu and a 24-pin slot for the main power. My power supply has a 24-pin cable, but not an 8-pin cable, only has a 6-pin and a 4-pin connector. My computer would not start with either of the 6 or 4 pins plugged in. Funny thing is, when i disconnected the 6-pin or 4-pin (when only the 24-pin was connected), the computer started up but would not go to the POST. I might also add that the CMOS light (orange) was lit. Proof that there is power flowing. My opinions: the motherboard should run with the 6-pin or 4-pin that my power supply has since all the customers on newegg have them connected with no problem. On top of that, the motherboard displays their product online with a small covering over the 8-pin slot. Basically, this means that it could have a 6-pin in it and run. I have contacted MSI and they were of no help. One of thier statements included: "ATX 12V power connection should be 20A or greater...". HOW IS THIS POSSIBLE? The most expensive power supply on newegg has about 19A's! And according to the reviews, other people are running this motherboard with even lower wattage power supplies than i have! I was thinking of buying a 4-pin to 8-pin converter connector depending on your responses. PLEASE HELP, ANYTHING WOULD BE APPRECIATED. :x: :doh:
6-pin is for PCIe video cards. Off-hand, I'm not sure it's supposed to be plugged into the motherboard. The 4-pin auxillary (2x2 layout), should be plugged into the first 4 pins on the 8-pin block [1][2][3][4] [5][6][7][8] Where the plug would be in pins 1-2 and 5-6. The 8-pin is for an EPS power supply, but your power supply should be fine. What I'd do is start with motherboard outside the case on a flat, non-conductive surface with the CPU, CPU cooler, one (1) stick of ram in the first DIMM slot, the video card, an power supply. Check your jumpers to ensure they're in the correct settings before powering it up. If it boots, add the other stick of RAM.
SOLVED My computer now runs, mysteriously, with the 4 pin connected. What i had to do was unplug the 4-pin connector, take out the CMOS battery out to reset it. After that i put the CMOS battery back in and then the 4-pin back in. It worked right after that. Strange if you ask me that the CMOS can cause such a case. Reply back if you have any additional info on what might have caused this. Thanks for the help Big B
