Starboard Value LP is launching a fight to remove the entire sitting board at semiconductor company Mellanox Technologies Ltd., the latest attempt by the New York activist to take over a whole boardroom. Starboard will nominate two of its own partners, co-founders Jeffrey Smith and Peter Feld, and seven others largely from the semiconductor world, according to a letter to investors Starboard will send Wednesday. The activist took a 10.7% stake in the company last November and has pressured it to boost margins or explore a potential sale.