Z640, and Z840 workstation feature can reduce boot up, calculation, and graphics response times? seenagape 9 years ago Which optional HP Z4d0. Z640, and Z840 workstation feature can reduce boot up, calculation, andgraphics response times? A.UEFI B.DDR4 C.HP Z Turbo Drive D.Thunderbolt 2 ← Previous question Next question →