Nvidia's support for OpenAI's planned Ohio data center campus now has a disclosed ceiling of $105 billion, with the company telling regulators its aggregate payment obligation is capped at that level under a partnership signed Monday. The arrangement, tied to OpenAI's lease of the SB Energy-developed campus in Pike County, Ohio, is meant to help finance the project by supporting certain lease and power payments and guaranteeing the value of parts of the completed infrastructure if OpenAI were to default. Nvidia is also investing $1.5 billion in SB Energy and will be the exclusive chip provider for the initial phase. The final cap is lower than earlier figures that had circulated, including roughly $250 billion under consideration and later reports that the guarantee had been cut to less than $120 billion. The reduction addresses a central concern for some investors: whether the AI sector is creating a circular financing loop in which Nvidia helps fund the infrastructure that in turn buys its chips. Those concerns surfaced in July, when reports of a much larger potential guarantee sent Nvidia shares down about 4.5% intraday. OpenAI said it will lease the campus for as long as 20 years. The broader site is expected to reach as much as 8 gigawatts of computing capacity, with the first 800 megawatts targeted for 2028 using existing AEP infrastructure. Further expansion will require new power plants, including natural gas generation, along with new transmission lines and related infrastructure. Nvidia has argued the model is about securing long-lived AI infrastructure while drawing in more outside capital, a strategy reinforced by its recent push with major financial institutions to target more than $500 billion in third-party funding for AI infrastructure.