Check my sig... and I'm surviving.... at this stage.
You have a dual 12V rail PSU which can peak at 34A. Guess it's enough, but if you have a high end CPU, lots o RAM and lots of HDD, then you should get 450W and higher.
Thanks Vokofpolisiekar. It's definitely reassuring that you and I have the same PSU so hopefully it'll have enough juice for the X1900XT I'm going to invest in.