Global banking giant HSBC today said N R Narayana Murthy, chief mentor, Infosys Technologies, will join its board in May with an annual renumeration of 65,000 pounds (about Rs 52 lakh)."Nagavara Ramarao Narayana Murthy (61) has been appointed a director of HSBC Holdings Plc with effect from May 1, 2008. He will be an independent non-executive director," HSBC said in a regulatory filing here.The appointment shall be for an initial three-year term, which will expire at the conclusion of the 2011 annual general meeting, it said.As a non-executive director, Murthy will not have a service contract with HSBC Holdings Plc, and would be paid a director's fee of 65,000 pounds per annum as authorised by shareholders at the 2006 annual general meeting, it said.