Hp zbook 15 g4 intel core i7 July 8, 2019 16 32 64 128 Hp zbook 15 g4 intel core i7 7820hq Hp zbook 15 g4 intel core i7 7700hq Hp zbook firefly 15 g8 core i7-1185g7 Hp zbook 15 g3 i7-6700hq Hp zbook 15 power g9