July 30 (Reuters) - Qualcomm shares fell about 5% on Thursday after the chipmaker's warning about higher memory costs and a steeper ‌decline in revenue from Apple raised concerns about near-term profit growth. A ‌surge in AI infrastructure spending has tightened semiconductor supply chains, driving up costs for memory, ​wafers, packaging and testing. Qualcomm plans to pass on those increases to customers through double-digit price hikes. For ​the current ​quarter, Qualcomm forecast adjusted profit per ​share in the range of $2.05 ‌to $2.25, well below LSEG-compiled analysts' average estimate of $2.36. Qualcomm trades at 14.31 times its ​expected earnings over the ‌next 12 months, compared with 43.85 times for Intel and ​17.49 times for Nvidia.