With our own Sequential tests we got slightly a slightly faster, 5,041MB/s, read result than the official maximum of 5,000MB/s while the write result from our tests at 4,331MB/s didn't quite get to the official maximum of 4.400MB/s.
128KB Sequential Read Performance v QD
At a QD's 1 and 2 the T-Force Cardea Zero Z440 trails both the Patriot Viper VP4100 and the Corsair MP600, the two other Gen 4 drives we've recently looked at. But as the QD deepens the drive leap frogs the Corsair drive and closes up right behind the Patriot drive.
128KB Sequential Write Performance v QD
As with the Sequential read performance, the write performance of the drive in comparison with the other two Gen 4 drives improves as the QD deepens.