Bought a new motherboard, and now PC won't start reliably


Feb 7, 2012
I just bought this Asus P8Z68-V to replace my other dead Asus, and now my computer will not reliably power on. That is to say, no fans powering on, no spinning discs, nada. It does have a light on the MoBo for having power. If I hit the power supply switch off and on again I can usually get it started, but then it boots to a "hey there was an error, hit F1" screen. I then have to tell the MB to try using MBR partition windows 7 made on my disc.

If I shutdown the comp and quickly hit the power button again it usually comes up every time, but if I wait a few hours I have to try the P/S switch trick again. The board has a power button it's self, and the results are similar to the case's power button. I should mention that once I've done the P/S and F1 things, this computer runs everything without a hitch. Have I goofed up somehow, or do I need to replace something again?

System Specs:
Asus P8Z68-V
Intel i5 2500k
Antec 650watt P/S
Corsair Vengance 2x4Gb
Nvidia GTX560Ti