Defending champion Fiji and PNG are the two undefeated teams, with two more rounds to play today.
PNG’s avalanche of tries was started by Salias Gahuna from the back of a break from Captain Isreal Eliab.
Then PNG winger Bland Abavu fended off a Solomon Islands defence to score.
With the crowd chanting, PNG ran in three more tries.
Thompson Teteh (2 tries) and Ase Boas scored runaway tries to get PNG to 28-0 at the drinks break.
In the second half, PNG piled on three more tries.
Rex Yallon, Willie Minoga and Boas double for the match.