Dell Technologies is trading 5.8% up at $427.50 after-hours, significantly boosted by strong signals from the AI server sector. - Rival Super Micro Computer's preliminary Q4 FY2026 update showed dramatically improved margin guidance of 15%-17% and a record order backlog exceeding $60 billion, reinforcing optimism for AI infrastructure demand. - This rally marks a sharp rebound for Dell after a 14% rout last week, which was primarily driven by valuation adjustments and profit-taking.