- 12VHPWR adapter for NVIDIA’s GeForce RTX 4090 - Two manufacturers, contact problems, bending radii and the human factor | igor'sLAB https://www.igorslab.de/en/good-or-bad-adapter-different-12vhpwr-adapter-for-nvidias-geforce-rtx-4090-and-where-you-can-see-backgrounds-investigative/ 50 comments hardware