Visiting a Factory Assembling 48GB RTX 4090s in Shenzhen

A few days ago, while I was modding a 48GB blower card at my workbench, a PCB supplier casually mentioned that there’s a line in Shenzhen assembling 48GB RTX 4090s. I was curious, so I took a trip over to check it out in person. English is not my native language, so please bear with my pronunciation or any awkward grammar in the dubbing! This is actually my first time shooting this type of video. I just edited it together based on my own thoughts and workflow. The factory also asked me to cut out quite a few sections for proprietary reasons. I honestly don't expect many views from this—I just wanted to document this experience and share it as a personal hardware log. Thank you so much for watching and hanging out! Chapters: 00:00 - Intro & How I Ended Up in Shenzhen 00:21 - Cleanroom Air Shower & Bare PCB 00:44 - Custom Dual-Sided 24-Pad 4090 PCB 01:05 - Solder Paste Stencil Printing & 3D SPI 01:40 - Panasonic NPM SMT Automated Line 02:18 - Mounting Salvaged AD102 Cores & VRAM 02:46 - 12-Zone Reflow Soldering Oven 03:26 - AOI & Industrial X-Ray Inspection 04:05 - Dual-Slot Blower Cooler Assembly 04:20 - 48-Hour Burn-In Torture Testing 04:48 - Wrap Up & Final Thoughts