Are you doing any footage processing in the background, like optimizing or creating proxy?
No
Are you working at a frame rate or resolution different from your source media?
No footage, working in 50i
USB 3 should be pretty speedy, but which USB 3 drive are you using?
Raid Buffalo 6TB
Not taking any material from usb3 drive, rendering to it
Are you using any 3rd party plugins aside from the build in title?
Yes
Which title exactly are you using?
Reelpath Star Wizard
Imac 27 Quad 3.4, 16GB Ram, 2GB Graphics, 6GB USB3.0 & Esata Raids
http://www.birdsaustralia.net
http://www.ferrarovideos.net