I'm running an AMD X2 5200+ @ 2.6ghz. Are there currently any real advantages of quad core cpu's over dual core? I have a MSI 8800GT 512mb video card and 4 gbs. of ram with an Antec 500 watt PSU. I usually upgrade about once a year, but don't think I need to as of yet because this system runs so well. Is there a noticeable speed boost that would make upgrading worth while, or should I wait another six months to a year?