Quote from Crashgate3 :

No, no and thrice no! Never, *ever* buy a cheap PSU. You want to be spending at the very least 60-70 euros on a good brand like Antec, Enermax, Thermaltake, Coolermaster, OCZ or Corsair.

A bad PSU will provide unstable voltages, nowhere near the power stated on the box and if (when) it breaks, it will more than likely take other components out with it.

I ordered this one - http://www.coolmatica.pt/loja/ ... Path/21_32/products_id/71 didn´t realize the other one hadn´t PCIEx connections

That's towards the bottom end, but it should be ok for you I've not heard of the brand but if the price reflects the quality it'll do the job.