The HP 800 G2 has an SSD storage medium which is faster than most PCs of this age and type. Most personal computers of a similar type and age to it have an HDD storage medium. Solid State Drives (SSD) store information in transistors on a circuit board rather than on optical or magnetic media. This has the advantage of being much faster than a traditional HDD drive.
An SSD storage medium is actually the best storage speed across all PCs of a comparable spec and age to the 800 G2.
Across comparable types of desktop computer the worst storage speed is HDD.