Well, I've got the Ritmo PSU in atm, no more burning smell in my room, so it seems it's the Antec. From what i remember it was kinda warmish/hot, but the smell was potent went you smelt the fan, though i never really noticed the back fan rotating, and i know it's thermally controlled, but **** something in there was bruning it should be spinning at that stage!! Maybe faulty fan, but yeah now I just need to find the receipt of bank statement to prove purchase...