whats the maximum watts i can put into my packard bell ixtreme M5850? I'm trying to run a Geforce GTX 550 Ti Graphics card and I get a driver error every few hours. I searched online and found it could be my Power supply. I'm sorry i'm not to Pc savy but from what I read my power supplies output is 250W. My Graphics card needs 400W to run smoothly. My system specs are Intel @Core i5 Processor 2300,6 GB DDR3 Memory and 1 TB Hard drive.