Ultra PSUs tend to be overrated, the 550 watt is probably closer to a 400 watt, not enough to run a 560Ti. I strongly recommend a better PSU for a 560Ti. You run a high risk of overstressing that power supply, the 560Ti uses about twice the amount of power of a 5770.
Alright, thanks. I figured this was the case because i have read some fairly bad things about ultra lol.