or should I go with 690? I really like the antec 300 with it's simple design but I'm worried it might not be big enough. Also, how many watts is requirement for an 4870X2? I mean how much is enough to be safe but not too much to be overkill?
the HD4870x2 is really not that big
its in fact smaller than a GTX 280 reference design
it fits in my Antec 900 with still more than an inch left
i dun have a antec 300 case though so im not sure about that
as far as powers go
i remember seeing ATi's presentation about a standard system with just 1 ATi HD4870x2 should have 730W of power