I'm experiencing a similiar problem. Hoping to get some speed on these renders and ray traces I just upgraded from a MacBook Pro with 2.6Ghz dual processor, 8 GB ram and a 1.5MB graphics card to a Mac Pro with the following:
3.5 GHz 6-Core Intel Xeon E5
16 GB 1866 MHz DDR3 ECC
Dual AMD FirePro D700 6144 MB ea
8-10 hours for a 250 pass ray trace on a small house with three lights on, six windows in view and a reflective wood floor. Elevation line drawings take 6-7 minutes and break out the cuss words if you try to resize the view, cause it'll be another 6-7 minutes. I've rebooted, restarted, held my tongue just so, even danced a jig hoping it would help, it did not.
Is this normal for CA X7