Here's the new 12-pin NVIDIA PCIe Power connector in more detail, much smaller then you think it is
Nvidia's 12-Pin Power Connector Will Work with Next-Gen PCIe 5.0-Compliant PSUs | Tom's Hardware
Antec HCP Platinum Dual 8 Pin to Nvidia RTX30 12 Pin PCIE Modular Cable - MODDIY
CORSAIR 12-Pin Sleeved GPU Power Supply Cable for 3060, 3070, 3080, 3090 Graphics Cards : Electronics - Amazon.com
2x 8 Pin to 12-Pin Graphics Card Power Cable for NVIDIA GeForce RTX 3070 US | eBay
What's up with NVIDIA's new 12-pin power supply? Don't panic, but this is actually overdue! | igorsLAB investigative | igor´sLAB
Nvidia 12pin, PCIe 5.0 GPU power connector and interoperability - HWCooling.net
Amazon.com: COMeap Replaement for Dual PCIe 8 Pin Male to Mini 12 Pin NVIDIA GeForce RTX 30 Series GPU Power Adapter Cable for EVGA Seasonic Modular PSUs 25-inch(63cm) : Electronics
Seasonic confirms NVIDIA RTX 30 series 12-pin connector - VideoCardz.com
NVIDIA RTX 3070 3080 3090 Mini 12 Pin Connector PCIE Extension Cable - MODDIY