hi i am new to the site and have a question. i just bought an hp 8034n pc 2gb ram 300 watt power supply and onboard grahics i wou ike to upgrade to a pci express card can someone recomend a good card but one that will work with my power supply.i do some flight simming but i dont want to replace the supply.some have mentioned the radeon x1550, x1300 help please . thanks