"But 8 pin PCI-e is limited to 150W?"
There is a common misconception that
ALL 8-pin connectors are limited to 150W - this is not true. First we need to differentiate between two connectors:
- Corsair Type 4/5 8-pin PSU connector - This is the 8 pin connector that you connect to your Power Supply. This connector can Supply over 300W.
- PCI-e 6+2 pin connector - This is the 8 pin connector you would insert into your Graphics Card, or the adapter that came with your RTX series cards. The PCI-e specifications have set this connector to being able to handle 150W. In reality it can handle much more, but due to variances in Power Supply and cable manufacturer's quality and materials used, the Graphics Card manufacturers are limited to only drawing 150W per connection.
This is also why you can safely Power'a GPU that needs two PCI-e 6+2 connectors with a Single Corsair Type 4/5 connector, since the connector on the
PSU end can Supply more than 300W, and each of the PCI-e 6+2 connectors only draws up to 150W each.
