How about this? since I am already buying coolermaster rc-690 from coolermaster.com maybe I should buy the case that comes with a coolermaster Real-Power 550W sli crossfire ready PSU? that's only $40 for a decent power supply
Also, do you already have the 4830s? or are you planning on getting them? If you are planning on getting them, wait until the 4770 comes out. It will use less power so you could probably run Crossfire easy with the Antec.
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