Electronics · PC Power Supplies (PSU)
What is ATX 3.1 and PCIe 5.1, and do I need a PSU that supports them?
Reviewer consensus
ATX 3.1 and PCIe 5.1 are the current Intel/PCI-SIG specs that require PSUs to tolerate large, brief power excursions from modern GPUs and use the safer 12V-2x6 connector (a refined version of the older 12VHPWR). For any new build with a current-generation GPU, mainstream reviewers strongly recommend an ATX 3.1 unit with a native 12V-2x6 cable rather than an adapter.