** Shares of U.S chipmakers rise premarket following global rally driven by AI demand
** Samsung 005930.KS and SK Hynix 000660.KS enter deal to supply chips to OpenAI's Stargate project, sparking a surge in chip stocks across the globe
** Nvidia NVDA.O is up 1.3%, Broadcom AVGO.O rises 2.6%, Advanced Micro Devices AMD.O gains 3.3%, while Qualcomm QCOM.O rises 1%
** Micron Technology MU.O rises 1%, chip equipment maker Applied Materials AMAT.O up 2.4% and Lam Research LRCX.O up 1.7%
** Philadelphia SE Semiconductor index .SOX, which touched a record high on Wednesday, has risen more than 30% this year
(Reporting by Avinash P in Bengaluru)
((Avinash.P@thomsonreuters.com;))