To connect an RTX 4070 Ti to a power supply, you will need to use a 12VHPWR power cable. This cable is new to the RTX 40 series and is designed to deliver the high power requirements of these cards. Most RTX 4070 Ti cards will come with a 12VHPWR adapter cable, allowing you to use three 8-pin PCIe power cables from your power supply. However, some newer power supplies may have a dedicated 12VHPWR connector, enabling you to use a single line to power your GPU. To connect the 12VHPWR adapter cable, simply plug the three 8-pin PCIe power cables from your power supply into the adapter cable. Then, fill the 12VHPWR connector from the adapter cable into the power connector on your GPU.