If the card recommends a 400W power supply I would invest in a one. You should definitely be running higher than 220W for the specs of your system.
When buying a power supply, make sure you get a reputable brand and with power supplies.. a common rule is 'you get what you pay for'
When buying a power supply, make sure you get a reputable brand and with power supplies.. a common rule is 'you get what you pay for'