NerdRalph’s story on upgrading GPU capabilities without using all new hardware.
My old card had two 6-pin connectors, which I had plugged a 1-2 18AWG splitter cable into. That was connected to a 16AWG PCIe power cable, which is good for about 200W at a drop of under 0.1V. My new card with the single 8-pin connector wouldn’t power up with just a 6-pin plug installed. Using my multi-meter to test for continuity between the pins, I realized that it’s not just a row of 12V pins and a row of ground pins.