** Shares of AI stocks tumble ahead of behemoth Nvidia's NVDA.O highly-anticipated quarterly report due after the closing bell on Wednesday

** Nvidia, which will have its results scrutinized for demand for its price AI chips, falls 1.2%

** Other chip stocks fall with the Philadelphia semiconductor index .SOX down 1.5%

** AI server makers drop: Super Micro Computer SMCI.O falls 8%, Dell DELL.N down 3.1%

** Earlier this month SMCI said it would file its delayed annual report by February 25

** AI-linked stocks globally are also under pressure for a second day after an analyst note late last week that flagged a possible slowdown by Microsoft on data center leasing

** Data center operator Digital Realty DLR.N slips 1.2%

** Power companies, which are expected to see a surge in demand from energy-intensive data centres needed to develop AI technology, slumped: Vistra VST.N sheds drops 5.5% and Constellation Energy CEG.O down 3%

(Reporting by Medha Singh)

((medha.singh@thomsonreuters.com))