The product page linked elsewhere in the thread[1] has photos of the 3070 with the 12-pin connector and mentions that all Founder Edition cards include an adapter:

> To that end, our engineers designed a much smaller PCB, shrank the NVLink and power connectors, and still managed to pack in 18-phases for improved power delivery. Don’t worry, we included an adapter that allows Founders Edition cards to work with users’ existing power supplies.

[1] https://www.nvidia.com/en-us/geforce/news/introducing-rtx-30...