Though firmware optimizations aid it in trouncing the Quantum Fireball lct15
, the U5 can't keep up with the rest of the competition. For example, it lags behind the category-leading Maxtor DiamondMax VL40
by 20% in the Business Disk WinMark 99. The margin grows worse in the High-End WinMark where Seagate's unit trails by more than 25%.