that was on low. Im running a intel core 2 duo. 3.0
Oh dear. That's not good at all. :( Check out the Computer building Thread. That will give you a good idea on what to upgrade. My advice would be to upgrade both your video card and your CPU.
For now, your CPU is fine, if you want to upgrade anything, I would advise to start with your GPU. I benched 1350-1380 on low with a Core2 duo 2.93GHz and a GT220 and ran the OB with minor lag. If you are on a budget, I've been reading a lot of good post about Core2 Duo's paired with HD 5770's which is what I will be getting next week.
DemonAdrastos of Titan(Retired)
PLD83, THF79, NIN85, WAR45, RDM45, SMN31, DRK37, DRG25
Windurst 10, Promathia COMPLETE, Zilart COMPLETE, ToAU 20
Paladin ~ Deimos Adrastos of Behemoth