Re: Need a double check(Approval) on my 2nd build
That means the mobo will support the faster memory, but DDR2 800 should work fine.
If the Q9550 is too high then I woul suggest getting an e8500. Both beat all Phenoms in gaming and run much cooler and use less power. Its a no brainer.
I would also suggest getting 2 gigs of memory instead of 4. I have 4 gigs and I can tell you that the real world performance difference isn't much. At least not yet.
Also, modular power supplies cost more for the same performance, so keep that in mind. You are already over budget.
I really don't know why you are so adamant about the case, but that is more to preference than performance anyways. It reminds me of a Power Mac G4, they had the tilt down panel like that.
Really the biggest reason you are over budget is because you want dual cards. the 4870X2 fits in this category, because it is 2 4870s stuck together. Remember that the price for them is double having only one card. You are at the very bottom of the price spectrum for a high performance crossfire system. It may be better for you to get a 4870 now and in a month or so get another and crossfire them. The only downside is with 4870X2's you would effectively have 4 gpus, while crossfire 4870s gives you to. But there isn't much practical reason for that anyways.