A:Answer Hi,
When paired with one of our compatible PSUs, the PSU alongside this power cable will be able to provide up to 600W. Our PSUs are capable of pushing 300W per PCIe 8-pin connector, while other PSU manufacturers may be limited to the standard 150W... hence four 8-pin connectors to support the full 600W. If you have any additional questions, please feel free to reach out to support via our website - we'd be happy to assist.
-Albert