Hi, still me documenting my own problem (I'd be glad if this can help someone else!)

I would like to give credits to Carcamel for this:

http://www.antec.com/ec/support_rodu...ber=1&FAQno=22
and this :
http://forums.silentpcreview.com/viewtopic.php?t=27863

It seems like my issue would be PSU related!

From the silent PC review forum thread :

Posted by gche on page 6

I bought the P150 case from Anitec in Vancouver on April 7 (the last one they had in stock). I knew of the incompatibility issue but I decided to try my luck anyway. So I put the computer together with an Asus P5WD2 Premium motherboard, it boots up fine, so I start installing Windows. Then it would freeze during installation, after a few tries I finally got Windows installed but then the comp would freeze on startup. I didn't think it was the power supply at first, but I switched the power supply to a SmartPower 350 from another computer and now it works flawlessly.

I'll send it back to Antec and see if it gets better. I'm not thrilled at the thought of having to buy another power supply.

Motherboard: Asus P5WD2 Premium
BIOS: 0606
Rev: don't know

S/N: S05110049026

Posted by GR8BALD1 on page 6:

PSU: Antec NEO HE550 S/N: S05100024376

At first I thought I was going to be plagued by the same problems the ASUS owners were having, being that ASRock is a division of ASUS. And upon initial installation I was proven right. But then someone was kind enough to remind me that in order for this PSU to start correctly (at least in my case) was that +12v had to be drawn from all 3 rails...he posted the solution, I followed it to the letter and GUESS WHAT..... it worked!!!
Now, I don't know if it will work for other setups, and I'm sure many have tried many different ones, but for those that want just one more setup to eliminate any doubts that you might not have tried everything I give you the following setup. Looking at the plug end of the PSU, from left to right..

Plug 1 (No) Plug 2 (Yes) Plug 3 (No) Plug 4 (No) Plug 5 (Yes).

This configuration worked for me....hope it works for others as well.
[...]
I'm definatly thinking the PSU is the culprit. I'll make sure to try another one once I get back from work.