My new fan interrupts energy supply, no boot therefore

[treesaredancing]

I recently bought a better fan for my system.
From a very unknown NX-01IT (http://www.nilox.com/it/Componenti/nx-01it-03nx029825001) I went for an Hyper TX3 EVO.
Once mounted I turn on my PC and it turns off on its own on the windows loading screen.
I tried booting multiple times.
I highly doubt that's a software problem as sometimes it was turning off just after POST, other times on the windows loading screen, entering the BIOS didn't make any better.
Tried windoes repair thing (not the one from the prompt) this on ->http://www.howtogeek.com/wp-content/uploads/2009/12/640x315xsshot20091217020232.png.pagespeed.gp+jp+jw+pj+js+rj+rp+rw+ri+cp+md.ic.FbPMw1QzvX.png
The new fan seemed to spin correctly tho.

Replaced the new fan with the old one, all is nice and as it was before, no booting/supply problems.

In case it's important I've also recently bought another PSU (as the older one was almost dangerous and was giving noise problems).
I went for a FSP Fortron PPA5005003 Hyper 500W (http://www.amazon.it/FSP-Fortron-PPA5005003-Alimentatore-colore/dp/B00LMBSTTA?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s01)
Tried to boot it up several times one day ago before the TX3 EVO, all went fine

Here my specs:
Mobo-> Asrock G41M-VS3 R2.0 Socket 775
CPU-> Intel Core 2 Q9505 @2.83 GHz
RAM -> Kingston 2x2 GB DDR3 @1333 MHz
PSU -> FSP Fortron PPA5005003 500W
Hard Disk -> WDC 500 GB SATA 7200 RPM

Other two things:
-The old fan is using 3 "pins" on the CPU fan thing of the mobo, the TX3 EVO uses 4 (all of them).
-A single socket pin seemed to be slightly bent / not on its place (was one of those highlighted http://i.imgur.com/rPogdvG.jpg)

Sorry if I'm posting this in the wrong section

Any help is greatly appreciated : ))

Any help is greatly appreciated : )

 

[ss202sl]

Is it shutting down because of temperature? I'd remove the fan, clean off the thermal paste, apply new paste and remount the fan again.

 

[treesaredancing]

Is it shutting down because of temperature? I'd remove the fan, clean off the thermal paste, apply new paste and remount the fan again.

I doubt that, before the pc would have turned off itself I touched the heatsink multiple times and it was warm.
The old one is the same.

Thinking about it, my thermal paste application was very mediocre, I applied the one which was included with the fan on the bottom of the heatsink and let the previous one how it was on the CPU, just to see if all would have worked (first time I'm doing this stuff : / )

My Tj temp is 100 °C btw.

 

[treesaredancing]

Also, I re-mounted the old/working fan without using any thermal paste on the heatsink and letting the one that was already on the CPU.

 

[ss202sl]

If the fan is defective (shorting out) causing the power to shut off, then it needs to be returned and replaced.

 

[treesaredancing]

Mh how do I verify that it's shorting out?

 

[ss202sl]

If the fan was shorting out, it would short out as soon as you turn it on. I'm still thinking it's a temp issue. What are the actual CPU temps?

 

[treesaredancing]

Now that I'm using my old fan they're 35-50 °C at idle and 75-86 °C at full load.

That's why I wanted to change my fan.