Wasn't thinking of quantity (watts) but quality - Of course your Aopen should be OK, but any PSU can go nuts and one of the first symptoms is frying optical drives. I've learnt that the hard way with 2 NEC 3540, 1 Benq 1640 and 1 Benq 1650 destroyed by such PSUs going bad. Oh and a HDD. :a - now I replaced all my PSUs with high-end ones.
I'm not saying in the least that this is the only possibility, just giving a hint for a direction to investigate.