Windows crash at startup even in fresh install

[skinkt]

A month ago, my Win8 PC got stuck while working, so I had to reboot. After I turn it on, Windows couldnt get started, even after it tried to repair itself, It said that it couldnt fix it. I waited a few hours, and It finally got past the Windows loading screen. It worked fine till a week ago, when it did the same thing and I had to reboot, but this time it didnt worked after many tries, so I decided to format the drive, and reinstall good ol Windows 7, but after a successfull installation, it crashed at the first start in the Windows 7 logo, going on a loop.

I bought a new hard drive thinking that mine might have died, and after another installation process, I could get through the first start. But it was working sooo slow, it took like 10 minutes to get to the desktop, and 10 more just to open the start menu. After I restart, the crash at startup returned.

I dont know what it can be, maybe the mobo died? I tried clearing the CMOS, updated the BIOS, replaced the CMOS battery, checked the RAM sticks, replaced the SATA cables, tried the HDD in the other SATA slots, tested the DIMM slots. Im running out of options here.

I think its hardware related, cause even after a fresh Windows install Im getting stuck at startup

Here's my system:

-Windows 7 and 8
-ECS P67 H2A3
-Intel i5 2300
-Seagate 500gb 7200 HDD
-2x4gb Kingston Hyperx RAM (tried with just one stick)
-AMD HD7870 2gb
-Antec NeoEco 520w

Any help would be much appreciated.

 

[Broken3D]

Your Ram is dehydrated

seriously its either ram, cpu or the fan (check if it overheats)

 

[skinkt]

I thought it was more of a motherboard problem, you really think it could be one of those? I dont think heat would be a problem since it worked well for months, and now it crashes just starting up so..

 

[skinkt]

I also ran memtest86 on both RAM sticks, so I dont think thats the problem..

 

[skinkt]

To add some info and sum things up, if I have 2 sticks of RAM, the PC doesnt start, it gets on a loop of 1 sec trying to start. With one RAM stick it starts but crashes at the Windows loading screen. The RAM is tested and working, so could it be the mobo?