I have two Powercolor Radeon 7770's that I am going to crossfire. My power supply is a Raidmax RX630Z 630 watt. Im running i7 3770S, 2TB Seagate 7200 RPM, 120GB SSD. I need to know if my power supply is big enough to handle the crossfire? This build is all about low power, low voltage, high efficiency, high performance. which is why the smaller power supply is in place.
I would probably say it would work. I've had plenty of cheap PSU's do the job. If it doesn't, buy a high efficiency PSU, like silver or gold, and make sure it packs the power, and is a reputable brand, because you can trust them so much more.