For about a year and a half, anyone running a GeForce RTX 50 graphics card was flying half-blind on temperatures. The card was quietly tracking its own hottest point, the hotspot or junction reading, but Nvidia had walled that number off from the monitoring tools everyone uses, leaving owners with only the gentler averaged GPU temperature. This summer, a wave of third-party utilities cracked the reading back open, and what surfaced ranges from perfectly ordinary to genuinely alarming. The sensor, it turns out, was never gone. It was hidden, and the story of why is more revealing than the numbers themselves.