An electrical connector includes an array of conductors held within a housing and a ground tie bar extending across the conductors. The conductors include signal conductors and configurable conductors, the latter being selectively configurable between a ground state and a signal state to define a ground conductor and a signal conductor, respectively. The ground tie bar includes a stem and plural ground fingers extending therefrom. The ground fingers align with associated configurable conductors to engage and electrically connect to the configurable conductors. The ground tie bar is programmable to selectively remove at least one ground finger from the ground tie bar. A respective configurable conductor is in the ground state when engaged by the associated ground finger, and is in the signal state when the associated ground finger is removed from the ground tie bar to increase a number of the signal conductors in the array of conductors.