my ups beeps when i try to play games at high res(1920x1080) with all the settings set to high.My GPU is a MSI gtx550ti 1gb Gddr5 and PSU is a 450watt one with dual 12v rails.Though the game runs smoothly when i run it,but suddenly the ups gives out continous beeps and then my pc shuts down.Now i am not sure wether i need to change my UPS or PSU..BTW my UPS is a 725VA one,a local brand..Can anyone help please!!