AMD, Broadcom climb as Nvidia turmoil creates opportunity

** Shares Advanced Micro Devices AMD.O and Broadcom AVGO.O rise about 3.5% and 1.8%, respectively, in premarket trading

** The chipmakers buck a broader selloff in AI-related names after weakness in Nvidia NVDA.O weighs on sentiment

** NVDA falls 6.9% after reports board met on Wednesday to decide whether to oust CEO Jensen Huang following news of extramarital affairs involving its longtime leader

** "A leadership vacuum could give competitors such as AMD and Broadcom more room to maneuver," says Susannah Streeter, chief investment strategist at Wealth Club

** AMD and Broadcom could benefit from growing expectations that they may move more rapidly to win customers if uncertainty at Nvidia persists, Streeter added

** As of last close, AMD shares more than doubled YTD, while Broadcom fell 0.25%, compared with a 49.1% gain in the Philadelphia Semiconductor Index .SOX