Hey guys i wanted to buy a new ups for my corsair rm 650 which is PFC activated. I did some research and found that my psu needs a pure sine wave using ups, but the price is way to much. So i just wanted to know which ups would be a good alternative to the pure sine wave ups so that i dont face any problems when the current goes off. I do face problems(abruptly shutting down of pc in case of power failure) with my current ups-CYBERPOWER BU series 1kva,which is using a simulated sine wave.i also learned that my pc needs more than a 1kva ups under load conditions. Any suggestions on which ups should i buy( i Cant buy an expensive pure sinewave ups)