I just had a quick question on PC power supplies for the build that I'm trying to put together. I was planning on doing something like brain_stew's $550 build (Phenom II X4, 4GB RAM, 4890) and I know that for that I don't need to over do it on the power supply (550W or so I would guess). But with an eye to the future I was figuring that if my computer needs a little more "ummph" in a year or two one of the best price / performance upgrades then might be to stick in another 4890 board and do the Crossfire thing while keeping all the other components.
So I was wondering, what type of a power supply should I be looking at that will support my current build and a possibly 2x 4890 down the road? I've been looking around, but I've not found much good info on power requirements for Crossfire setups. Or is this even a good idea for a possible upgrade?
edit: Actually managed to track down a pretty good 4890 CrossFire benchmarking article that listed what wattage to aim for. Article
here if anyone else is interested. The benchmarks in the article do make it seem like this would be a pretty good upgrade for my machine sometime like a year from now when 4890s cost like $140 or possibly lower.