Thank you Olo401 but there's something I don't understand about newegg.
This is the memory you suggested me, the original price is 2$ cheaper than what I picked.
Original Price: $63.99
You Save: $12.00
$51.99
What do you have to do to save that money? Mailing rebate or something? If so, i'm not going to do it, since i'll most likely never see the check anyway.
I did not know that my videocard was overkill/high end, for that price I figured it was just mid-range, so thanks for the notice. Money saved is always good.
About the HDD, I TOTALLY agree with you, but I couldn't find a decent cheap HDD, I must have overlooked yours.
As for the power supply, the requirements of the graphic card you suggested me suggest this:
500 Watt or greater power supply with two 75W 6-pin PCI Express power connectors recommended
I'll probably just try to find that and a case at a local shop because I don't want astronomical shipping fees.
For the heatsink, the one you proposed does not seems to support phenom X4, so I picked
this one instead.