Seattle dev seeks help for multi-GPU build

Local LLM hardware is hitting a "complexity wall" where even high-end enterprise components like the MC62-G40 require specialized BIOS and physical tuning.

• –The GIGABYTE MC62-G40 is a gold standard for 7-slot PCIe 4.0 expansion, but slot-sharing with M.2 NVMe drives frequently catches builders off-guard.
• –Threadripper Pro's 128 PCIe lanes are the only viable path for 4+ GPU setups without severe bandwidth bottlenecks, making this a high-stakes build for 400B+ model inference.
• –Power delivery is the silent killer: failing to populate both 8-pin 12V CPU connectors on these boards can lead to physical motherboard failure under multi-GPU load.
• –The request for "extra hands" underscores the physical difficulty of high-density GPU cooling and riser management in non-server rack chassis.