{"slug": "designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs", "title": "Designing an open-source budget 4x V100 SXM2 NVLink backplane — passive PCIe vs PEX8749?", "summary": "A hardware developer is designing an open-source, budget 4x V100 SXM2 NVLink backplane, weighing passive PCIe versus a PEX8749 switch, and has sourced technical references from Benchoff Design's reverse-engineering of the SXM2 socket and a blog post on dual Tesla V100 eGPU setups.", "body_md": "Do you actually have a good source for info on the 1CATai developments? The best I’m aware of is this [The Most Esoteric eGPU: Dual NVIDIA Tesla V100 (64G) for AI & LLM](https://blog.rexyuan.com/2025/09/30/v100/)\n\nI gotchu [Reverse Engineering the NVIDIA SXM2 Socket | Benchoff Design Portfolio](https://bbenchoff.com/pages/SXM2PCIe.html) . I actually already had this open.", "url": "https://wpnews.pro/news/designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs", "canonical_source": "https://forum.level1techs.com/t/designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs-pex8749/250801?page=2#post_41", "published_at": "2026-08-30 07:29:59+00:00", "updated_at": "2026-08-30 07:51:28.828394+00:00", "lang": "en", "topics": ["ai-infrastructure", "ai-chips", "developer-tools"], "entities": ["NVIDIA Tesla V100", "Benchoff Design", "PEX8749"], "alternates": {"html": "https://wpnews.pro/news/designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs", "markdown": "https://wpnews.pro/news/designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs.md", "text": "https://wpnews.pro/news/designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs.txt", "jsonld": "https://wpnews.pro/news/designing-an-open-source-budget-4x-v100-sxm2-nvlink-backplane-passive-pcie-vs.jsonld"}}