When I first set up my loop I was getting loads of around 60 degrees at 1.35v with the bubbles in the reservoir.
Now, a few days later, the reservoir is completely clear (looks good!) and I load at 54 degrees at 1.4v.
Those bubbles really do make a difference, just be patient. Don't do anything, just sit back and wait for them to disappear. Okay maybe not sit back, as it takes a few days, but you get the idea.
How much would CPU temps drop by giving it its own loop vs. one with two video cards? I'm Googling and I can't come across any hard and fast numbers on what kind of temps people get on i5 or i7 on dedicated loops.