C2D E8400@3.9ghz enough for HD4870 CrossFire

Yes.

It Depends on the Game/Program.............

Some Programs are CPU efficient and do not require lots of horsepower.
Some Are CPU Hogs and Require Fast CPUs.
Some Only use 2 Cores
Some Only use 4 Cores

However, No Game is going to REQUIRE those types of specs.
If it did, it would be suicide because there would not be a sufficient market.

You System is Sufficient for any gaming needs.

Since you are a gamer it is worth it.
A Quad would be slower in games than what you have.
Your mobo supports Crossfire at x8 speed which is okay.

ok thanks alot to all that have replyed, really helpful infomation

Another thought crossed my mind , i read that nvidia are about to release there new graphics cards, i think there called GTX275 and GTX295, also intel will be releasing the larabee soon right?

so is it worth upgrading now? (take into consideration the economic down turn) or should i want until the next generation of video cards are released?

Any ideas? please post!!

Ok thanks alot Karl.

It seems to be impossible to stay up to date (unless you have money to burn) so i think ill go for another HD4870, that should give me decent performance, even when the new cards are released.

I dont understand the core i7 if most games only use 2 cores and a hand fall use 4 cores, maybe there aimed at people who use photoshop and HD decoding. I think ill stick with my trusty Duo for now

i understand that some games scale better than others, i read some reviews about crossfire and older games like UT3 didnt scale well at all, also prey didnt either, but games like COD4 which scaled amazingly well (more than 100% performance increase vs one HD4870) and others like devil may cry 4.
i also noticed that id notice the most difference in performance when the game is set to a high resolution (1650x1080 and above).