The acute memory chip shortage and consequent soaring prices has forced Sun Microsystems Inc, Mountain View to impose a memory surcharge across much if its workstation product line, primarily affecting add-on memory. Sun has raised these by 50% to $750 per megabyte for the Sun-3/60, Sun386i and Sun-3/100 product lines, and by 38% to $780 per megabyte for the Sun-4/200 product line. Sun-CXP graphics workstations and graphics accelerator board prices have also gone up.