paralleling power supplies

[Flomac]

You're obviously ignoring the rules of electricity and I don't have time to explain the basics in electronic to you. Let's just say it's not that simple, you can do a lot of damage and in the end it's even hazadorus. What you want to construct is a redundant PSU, but that's not how it's done. If you use two different PSUs, plug one to GPU1 and the other one to GPU2. But avoid mixing up different current circuits.