OK,well you went with a much better PSU,So unless anyone else has anything,I would still say an issue with the motherboard perhaps.
Anyone you know that you can try your cards crossfired in there system?
the only other thing i can suggest:
1-uninstall CCC through control panel,add/remove(caps also)
2-shut down,remove second card,restart
3-install ccc and caps,shut down
4-reinstall second card,restart(of course plug in the power and bridge)
I have had this help a few people with crossfire issues and once for me for a build,worth a shot.
AMD Phenom II 1100t @4.0Ghz <Asus sabertooth 990fx<2x Gigabyte 3G 7950's in crossfire<Samsung 500G 840 EVO SSD<16G G-Skill Ripjaw 1600<2-samsung 24" monitors 1920X1200<Corsair AX1200W psu<W7 pro 64<Logitech G19 keyboard<Roccat kone pure mouse<Cooler master HAF932<Corsair H100i water cooler<Zalman ram cooler<Sound Blaster X-Fi Titanium Fatal1ty Champion Series<Logitech Z5500 speakers<Roccat Kave 5.1 headset.
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