Harddrive speed randomly changing even though it's at 100% usage.

Zuver

Commendable
Jun 26, 2017
14
0
1,510
So I bench marked my hard drive in CrystalDiskMark5 and I was getting like 150-160 mb/s read and write speed while the hard drive was at 100% usage(The Read and Write speed in Task manager matches these results too). But when I load a game for example, the hard drive usage goes to 100% but the read speed is only like 20mb/s. Why exactly is this happening?
 
Solution
fragmentation. location on the disk. lots of things can cause this; furthermore 150-160 mb/s sounds like you're benching your hard drives Cache, not the hard drive itself.