Is the motherboard dead
 

I overclocked the cpu to 5 GHz my brothers 2500k with a z68lx motherboard from asus for a few days the overclock seemed stable now all of a suden the system dosent even load up into windows what could be the problem its not the ssd since we checked that. Its got too be the cpu or the motherboard we're just not sure.

Re: Is the motherboard dead
 

Probably the CPU. Try to get into BIOS and remove the overclock.

Re: Is the motherboard dead
 

I've never overclocked a CPU due to the inherent possible issues it can cause. Overheating is just one of them. I would check in BIOS for temperature and ensure that isn't part of the problem. I would look at the RAM to ensure it can handle the 5Ghz speed you are now demanding of it. The motherboard being an asus would be suspect although the brand has gotten considerably better the last few years. CPU as you mentioned could be part of issue. It's really going to come down to a test and check of different parts of the system.

Honestly after checking that my RAM was enough to handle what I'm asking it to do; I would try changing the settings back to not over-clocked and see if it start working again. If it does then the over-clocking set up you have is causing the issue and you won't need to replace anything. If not then something else has gone wrong and you'll need to start checking individual components.

Re: Is the motherboard dead
 

I forgot to mention we put everything to stock in the bios and windows wont boot up.

Re: Is the motherboard dead
 

CMOS reset?

Re: Is the motherboard dead
 

It's possible the overclocking may have screwed up the Windows Operating System, which means you may need to reformat and reinstall Windows. If that doesn't work, you'll need to check each individual component (hardware).

EDIT: Is there any sequence of lights and/or beeps when you turn on computer? Reason being, if you do, record the sequence (write it down) and go to Google or motherboard website for your computer and search for that sequence and it should indicate the specific component issue.

Re: Is the motherboard dead
 

When you say "Windows won't boot up" how far does it get and what errors does it give?

Re: Is the motherboard dead
 

And what post code does it end on?

Re: Is the motherboard dead
 

Blue screen

Re: Is the motherboard dead
 

And what's on that blue screen?