Power on-off loop [new Motherboard, CPU and RAM] [closed]

Question

I just got some new parts from my PC and just finished adding all together. When I try to power on my PC, it goes into an infinite loop: on - off - on - off - etc. If I keep my thumb on the power button, it shuts down for good, of course if I press it again I get the loop again.

Without thinking before, I tried to open it and removed and turned my heatsink 30 degrees, so I could mount the CPU fan power cable better. Is this a problem? I mean, do I really have to reapply thermal paste or what?

I have 4 phase LEDs and all of them are on. From green to red, so that's why I'm pretty sure it's the CPU.

The other thing I'm thinking about is the RAM (see bottom specs). From where I bought this motherboard they said it supported DDR3 1600 MHz. In the guide however it says that it's only supporting a maximum of 1333 MHz. So I went to the RAM website (from where I got it) and I saw that some tried with 1600 and it worked. Maybe I had a too powerful RAM, I don't know, I'm not really into this.

Anyway, have a look at this parts:

• Gigabyte H55M-UD2H

• CPU Intel® CoreTM i3 540 3.06GHz

• Dual Channel Corsair 4GB (2 x 2GB), DDR3, 1600MHz

• Rasurbo Silent-Power DLP-55.1, 550W (PSU)

The URL are in Romanian but you can understand the specs.

Edit: I added my power supply as well, I just asked someone and he said that if it goes in this kind of loop (1 sec on then goes off) it may be the power supply.

Answer 1

This is usually a CPU problem. Flush the power from the machine by unplugging it then holding in the power button. Remove the CPU from the socket entirely then reseat it. Re-apply thermal paste if needed, motherboards with thermal protection features will automatically shut off if they get above a certain threshold, so the paste may be your only problem causing the restarts.

Answer 2

It was actually a case short! I feel so stupid that I didn't bench-test it before I place it in the case.

Now, I have another question. Is there a way I can use my old Windows 7 Installation or install the new Drivers without having to install Windows again (format)?