Super Micro Computer (SMCI) stock fell 17% in premarket trading on Wednesday, after the artificial intelligence server maker's outlooks for earnings and sales in the current quarter missed Wall Street's estimates.

Super Micro Computer , whose auditor unexpectedly stepped down last week, on Tuesday flagged uncertainty about the timing of its annual report but said a probe about accounting practices had not found evidence of fraud by the company.

Super Micro says its special committee has so far found that its audit committee “acted independently and that there is no evidence of fraud or misconduct on the part of management” or the board.

On Tuesday, Super Micro said its independent “Special Committee” formed by the board of directors and led by independent counsel found “no evidence of fraud or misconduct on