New Build: Motherboard wont POST, no monitor input. However there's a twist...

Hello all,

I have just built my first PC, the parts list can be found here http://pcpartpicker.com/p/2zGF5 . So here's my problem. I've put my build together, plugged everything in, the whole shebang. Now when I hit the power button I get the cpu fan, the case fans, and the gpu fans spinning nicely, but my monitor is telling me i've got no input. I also have never gotten a POST beep from my motherboard at anytime during the build.

Now heres the twist... my gpu takes two power plugs. When I only attach one plug (larger of the two) and turn on the machine, I get a message saying "attach all PCI-E cords" on the monitor. If I then attach the second cord while the computer is still running, and then reset the machine, I get monitor input and windows starts right up! This process has been replicated three times to make sure it wasn't a fluke. I even installed my OS while it was running.
Why doesn't it display anything when I have both gpu plugs in for startup?! I don't want to have to fiddle with it everytime I power up.

Additional info: Monitor is hooked up to the graphics card through an hdmi and a dvi input, check both everytime I start up. Here is a picture of my mobo and all connections http://i.imgur.com/gRd0TTA.jpg

What i've tried: removed everything, hooked it back up again. Tried my RAM in every slot there is.

Any help you all can give me is greatly appreciated... my brain is fried trying to get this thing to work!
11 answers Last reply
More about build motherboard wont post monitor input twist
  1. Your PSu is not good for this build. You really need a a 500w unit. You will be overdrawing the amps on that 430w unit and it could fail and fry the computer. 430w is actually enough, but the amps on the 12v rail are what is important and using a molex adapter, you will likely overdraw it.
  2. tiny voices said:
    Your PSu is not good for this build. You really need a a 500w unit. You will be overdrawing the amps on that 430w unit and it could fail and fry the computer. 430w is actually enough, but the amps on the 12v rail are what is important and using a molex adapter, you will likely overdraw it.


    Yeah I had concerns about that too. I only went to 430 because it was cheaper, but you're right. Ill replace it asap. But could this be the cause of the no input and no POST?
  3. It could be the issue. Do you have the monitor connected to the GPU or motherboard?
  4. tiny voices said:
    It could be the issue. Do you have the monitor connected to the GPU or motherboard?


    Connection is from monitor to GPU with both an hdmi and dvi.
  5. well that is not connected properly. Only use ONE cable, not TWO
  6. tiny voices said:
    well that is not connected properly. Only use ONE cable, not TWO


    I had both connections to make sure one of the cables wasn't one of the problems. Just tried startup with each one connected on its own. No dice.
  7. From now on only use one. This can cause issues too.
  8. Will do, thank you. Could I have an issue with the fact that my motherboard is DDR3 1333, and my RAM is DDR3 1866?
  9. Nope, your RAM will just default to 1333 and run at that speed.
  10. Carandom said:
    tiny voices said:
    Your PSu is not good for this build. You really need a a 500w unit. You will be overdrawing the amps on that 430w unit and it could fail and fry the computer. 430w is actually enough, but the amps on the 12v rail are what is important and using a molex adapter, you will likely overdraw it.


    Yeah I had concerns about that too. I only went to 430 because it was cheaper, but you're right. Ill replace it asap. But could this be the cause of the no input and no POST?
  11. you posted your build as a 850w PSU. Did you change your orded as this would be plenty of power for your system.
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