The export of advanced chipmaking tools is also restricted.
Resellers and third parties were also prohibited from selling the chips to Chinese entities.
The tenders are valued at between about $10,000 and $259,000.
Nvidia said the tenders specified products that were exported and available before the restrictions.
The three server makers told Reuters that they comply with US and international export restrictions.
Supermicro said the products are older-generation models and that the suppliers are not known customers.
