The Precision T3610 has an HDD storage medium which is faster than the Fusion Drive storage medium found on most personal computers that are a similar age to it. A Hard Disk Drive (HDD) is the traditional storage method for computers. A HDD stores the information on magnetic disks. HDD drives are cheap, but they are slower than Flash and SSD bases storage systems.
This desktop computer's storage speed (HDD) is in fact the worst storage speed across all PCs of this spec and age.
An SSD storage medium is the best storage speed across comparable types of desktop computer.