Maximum PC

So I built an AMD computer using the following components:

Fractal 1000 case
ASRock 960GM/U3S3 FX AM3+
AMD 4170 (4.2 Turbo 4.5)
2x2GB OCZ DDR3 1600 4GB total
eVGA 9600GS
Corsair 430W PSU
2x250GB HDDs in RAID 1 (Mirroring)

I've included all this information in case one of these is complicating issue.

When I hit the power button, about 30-50% of the time the computer powers on like it's getting ready to boot up, but nothing happens - nothing on the monitor, no activity from the HDDs. If I restart the computer (by holding the button for 4 seconds & then trying again, or by hitting the reset button) then everything operates properly.

Once the computers running, there is nothing wrong. I performed Sisoft's SANDRA without errors or crashes.

Some additional Information:

• I originally OC'd the CPU to 4.5, but I've backed it down to stock speed
• I noticed the mobo takes 1333 natively, but OC is required for 1600. I originally didn't notice this and just inserted the RAM; since then, I've reduced the RAM speed to 1333 in the BIOS
• I also noticed the RAM voltage is supposed to be 1.65 - I haven't done anything with that yet & the BIOS RAM setting is set to AUTO but that is something I may set manually later
• I noticed ASRock has a BIOS setting called Boot Failure Guard that is enabled - I don't fully understand what it does, but I thought I'd mention it

My first guess is that there was a BIOS setting that was causing the issue, but the more I think about it the less it makes sense. The case and the PSU are becoming more suspect. Maybe even the RAID.

I'm just hoping someone out there has experienced a similar issue and might have some insight. Any suggestions are welcome. Thanks in advance.

Upon checking ASRock's support site for this particular motherboard, I noticed that your particular processor is not listed in the supported CPU list. While I realize that this might be outdated information, my next question is this: are you running the latest BIOS revision for this motherboard? If not, updating the BIOS might resolve your issue.

Usually when you get a semi power up condition, its either the motherboard or the PSU. The power good signal is not coming thru, or coming sporadically. If you have another PSU, I would try to swap that in and see what happens.

Absolutely update the bios! I had to update the bios on my Sabertooth motherboard to run my 8150 processor.

Nasty

Looks like I will be updating MY mobo. I am building a new rig with a Sabertooth and an 8350!!