Customer sends four RTX 4090s to a repair technician, finds out three are fake — new counterfeiting technique uses modded 30-series chips by editors@tomshardware.com (Aaron Klotz) from Latest from Tom's Hardware on 2025-06-15 12:22 (#6Y08A) A Chineese repair YouTube recieved four faulty RTX 4090 graphics cards only to find three of them were fake, based on RTX 3080/3080Ti and RTX 3090 GPU dies.