Slaven Vlasic/Getty Images for The New York Times; Chelsea Jia Feng/BINvidia and AMD were leading big gains Wednesday across the semiconductor sector.AMD surged as much as 11% after a blockbuster earnings report.Nvidia is getting a boost from that and surging after being renamed Morgan Stanley's top semi pick.Chip stocks were rallying across the board on Wednesday, driven by a big earnings beat from AMD and Morgan Stanley naming Nvidia a top stock pick.AMD spiked as much as 11% before paring gains to about 5% higher.