pgalore, did you get a one-year warranty with your refurb. PB? If less, I agree with cordelli that I wouldn't expect it to perform as spec'd. The only problem I've had with more than 15 Mac CPUs (DTs and laptops) is with one G3 DT I bought refurb. Died a few days after arrival, fixed by the vendor and about 2 yrs. later, HD died.