The bottom line is: you are asking for a 900W PSU. What exactly are you using that needs 900W? If it's a server, then 900W might be right. If it's an average desktop, though, you might need only 500W, maybe even 400W. Unfortunately, at those low power ratings, there are very few PSUs that have 80 PLUS certifications. The new Enermax PRO87+ and MODU87+ are certified 80 PLUS Gold and are sold as 500, 600, and 700W PSUs.