美国部分芯片股盘后走强，英伟达(NVDA.O)涨1.2%，AMD(AMD.O)涨近1%，英特尔(INTC.O)涨0.4%。

Group 1 - Key Point 1: Some U.S. chip stocks strengthened after hours, with Nvidia (NVDA.O) rising by 1.2% [1] - Key Point 2: AMD (AMD.O) increased by nearly 1% [1] - Key Point 3: Intel (INTC.O) saw a gain of 0.4% [1]