The HP 820 has an HDD storage medium which is faster than most desktop computers that are a similar age to it. Most comparable spec computers that are a similar age to it have a Flash storage medium. 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 PC's storage speed (HDD) is in fact the worst storage speed across all computers of a similar spec and age to the 820.
An SSD storage medium is the best storage speed across similar types of PC.
We compared this personal computer to all the other HDD personal computers and we think the HP Z640 which has better reviews is also worth considering.
If the storage speed of this many processor core personal computer is too slow for you then you might want to consider the HP Z440 MT (SSD), or the Lenovo Thinkstation P500 (SSD).