What parts are damaged??

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Im making a new thread because my old one seems to be dead,

Basically i fried my psu, and didnt know what other parts would still work, so i bought a new psu, and new motherboard.

I installed the ASRock Z68 Extreme7 yesterday, and my pc booted once, and then wouldnt boot again, i thought it was an error with the board, so i went back to my old motherboard, an asus p8p67, which 'may' have been fried with the psu, and it seemed to work, installed windows... again... onto that, and it booted fine once, i played a couple of games, but again it froze, like the weird lines u get before the blue screen of death, or what ever it is, and now this motherboard wont boot either. Where do i stand here? What parts may have been damaged, seeing as the brand new ASRock clearly isnt, would it be ram, cpu or what?
 
Old Motherboard > Asus p8p67 pro
New motherboard > ASRock z68 extreme7

Ram : Gskill 16gig
CPU : i7 2600k
GFX : ati hd 6870's c/fired
HDD : Western Digital 1TB
SDD : OVZ Vertex 120GB
Water Cooling : Antec Kuler 620 (doubt anything wrong with that)

I think thats it, but from what i can see, if the old motherboard started u once, then surely it isnt damaged, and it done just as much as the new motherboard did, which was brand new delivered that day.

Im guessing its either the ram or cpu, but the pc started once, but then didnt start again?
 
Old Psu : Some cheap 40 pounds 850 watt, from a random website, was cheap at the time, but a bad choice looking at things now.
New PSU : Powercool 1050W

Both motherboards seemed to be as good as each other being the amount they booted, both once, and then both never again. So i still highly doubt that my old motherboard what touched what so ever
 
Absolute minimum hardware being?
1 gfx card at a time? Or none?
1 stick of ram at a time, to trial and error the problem,
and if none of them work, i guess it has to be 100% the cpu?
But then again, i start thinking it could be the SSD/HDD :p
I know all these theories, i just wanted to check on here first, in case anyone has some past experience/ is a technician, and knows the answer already, cant be asked to sit down with my pc already, would rather search forums for a solution first :) spent over 12 hours yesterday, pulling apart my pc, and putting together different parts.
Just a question, how safe is it to build a pc out of the case, would be car more time consuming for me to find a solution, and once found i can just put it back in the case?
 
So long as you don't build it on something like tin foil then you should be fine, I had my current PC out on my desk for weeks.

But yeah train what bainbridge said, I'd run it with no GFX cards (I'm sure i7 has inbuilt GPU) and as little RAM as possible, ensuring it is in slot 1

The only way it'd be the SSD/HDD would be is if you can't get past BIOS, in which case by the sounds of things you can't even get it to start up. Does your power switch not do anything?
 
Whats the things to look out for, for what parts could be damaged?
For example, how to tell if its the motherboard at fault,
how to tell if its the cpu at fault,
best way to tell if its the SSD and/or HDD at fault?
and i doubt its the gfx, but just by booting up without them, and it still doesnt work, then it shows its not them at fault?
 
Also, just to add, i booted up before, done all the updates, restarted etc, it was fine, its only when i started using it for sure, testing overclock in bios etc, fidling around trying to get it to boot, thats when things stopped booting what so ever. So just to clear things up, i change my resolution to 1600x900 fine, so i guess thats the graphics cards fine so i can tick them off?
 
Either board, being the Asus p8p67 pro/ASRock extreme7 cannot boot!
The asus gets to the windows 'welcome' screen and freezes for around 10 seconds before the screen turns to the blue screen, even on reset bios.
The extreme7 gets to the windows sign/logo with the black background, and freezes, and nothing happens, it needs me to switch it off at the front of the pc for it to respond.

Over the past day, i have installed windows 3 times, twice on the ASRock, once on the asus, both times, they restart, freeze a couple of times, but eventually boot up fine, did all windows updates, each motherboard took about 1 hour, installation, and updates, i downloaded all the programs i normally download, installed gfx stuff like catalyst control centre (Changed Resolution from the 1010x700 or w/e to 1600x900). On the ASRock, i reinstalled once, just to check out the new features of my new board, and that was it, it never booted up again. The asus, i played a couple of games, lasting 15 mins or so, and it froze, and blue screen, never loading up again, only to windows 'welcome'. Rarely to the dekstop, but that is followed by an instant freeze.
 
Okay! Now I know everything I'll try my best to help.

Right, so if I were you I'd try installing to your HDD, it might just be your SSD is on it's way out.

If that doesn't, try doing a Memtest if you have no already done so to rule out RAM
 
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