This generation of Quantum Fireball drives was launched in mid-1995 and offered 0.54 and 1.08 GB capacities.

It quadrupled the Fireball SE's cache to 512 KB, while still having a 5400 RPM spindle speed.

Launched in late 1999, the Fireball CX was Quantum's first hard drive with GMR heads.

(Shipped with the iMac G3 in late 1999) The Fireball Plus KA, launched in 1999, was known for being Quantum's first 7200 RPM IDE hard drive, while still having 512 KB of cache and an ATA-5 interface.

Launched in early 2000, this series increased the cache size to 2 MB while still having the ATA-5 interface.

Launched later in 2000, this was Quantum's first hard drive to feature fluid dynamic bearings and an ATA-6 interface.

Launched in late 1999, it had a 512 KB cache,[4] 5400 RPM spindle speed, and an ATA-5 interface.

Quantum's last hard drive designs eventually got rebranded as Maxtor after the merger.

The Maxtor D540X was available in 20.4GB, 40GB, 60GB and 80GB capacities with disk densities of 40GB/platter, using 2 platters for a maximum of 80GB and with 2MB cache These drives originally were intended to be branded as the Fireball Plus VQ.