"The Nvidia investment in OpenAI is also expected to boost demand for AI servers," Huang said. iPhone assembler and AI server maker Hon Hai Precision Industry Co., second to TSMC in terms of market value, gained 2.31 percent to end at NT$221.00. Meanwhile, Delta Electronics Inc., a provider of power management solutions for AI devices, lost 1.54 percent to end at NT$893.00. "Today's gains on the main board appeared uneven, with many non-tech stocks moving in weakness as the spotlight completely focused on large-cap tech stocks," Huang said. According to the TWSE, foreign institutional investors bought a net NT$10.64 billion worth of shares on the main board Tuesday.