I'd still go with the iStar, even though it isn't on the lists. That's a PD1 model, and the tiered listing has PD2 and PD3 on tier-2. I would think that PD1 would be no lower than tier-3, which should be safe. Rosewill is iffy. Although Jonnyguru reviewed some Rosewill models and found them quite good, I don't recall that the RX-630 was one of them and that site is blocked at work; it does have Active PFC so is probably better than the typical models that earned Rosewill a place on tier-5, but I don't think I'd trust it.