MSI P67A-GD80(B3) Boot Loop

Hi I recently purchased a mainboard from craigslist and I have fully built my system but to my disappointment the motherboard shuts down and turns on infinitely. I believe this is called a boot loop. My specs are as follows...
CPU: Intel I3-2100
MOBO: P67A-GD80(B3)
RAM: 2X4 DDR3 240 pin samsung
CASE AND PSU: Antec nine hundred with 750W

I have tried the following
-Removed one stick and tried, no avail
-Removed battery and unplugged system them cleared CMOS using button, no avail
-Removed boot drive, no avail

I know there may be more things I haven't tried yet thanks in advance for the help!
2 answers Last reply Best Answer
More about msi p67a gd80 boot loop
  1. Best answer
    Check both the power connectors are plugged in properly. What psu model is it?
  2. OMG BAYI7 THANK YOU SO MUCH I KNEW I WAS FORGETTING SOMETHING... sorry for the yell but it was the 8 pin i forgot thx so much yoi the man! :P
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