老湯 http://www.tomshardware.com/news/pc...ress,32525.html

PCI-SIG reached out to tell us that the power increase for PCI Express 4.0 will come from secondary connectors and not from the slot directly.
They confirmed that we were initially told incorrect information. We have redacted a short passage from our original article that stated what were originally told, which is that the slot would provide at least 300W, and added clarification:

PCIe 3.0 max power capabilities: 75W from CEM + 225W from supplemental power connectors = 300W total

PCIe 4.0 max power capabilities: TBD
New value “P” = 75W from CEM + (P-75)W from supplemental power connectors.

To ensure optimum max power, it is recommended that card and system implementers refer to the associated PCI Express specifications that include high-power thermal and mechanical guidelines. Implementers should review also refer to the latest versions of the PCI Express x16 Graphics 150W-ATX Specification (including the supplemental power cable) and the PCI Express 225W/300W High Power Card Electromechanical Specification for additional information.

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所以從PCIE插槽取電依然維持75W..