Hi, I recently bought a computer. It's a Lenovo H430 (specs ----> http://reviews.cnet.com/desktops/lenovo-h430-core-i5/45... ). It suits my needs until now. I would like to game but the HD 2500 is really depressing. I bought a separate card it's a ASUS Radeon HD 7770. I'm not sure what PSU to get since I'm assuming my current stock PSU won't support the card. Any help will be greatly appreciated.