when I try to benchmark my hdd read speed, I see something weird

[wolframazer]

my hdd is 3.5 wd caviar blue 1terrabyte, I monitor the voltage of my psu using asus ai suite my psu is seasonic s12ii 520w, my psu voltage is +12v: 12.288v, +5v: 5.080v, +3.3v: 3.392v, when I benchmark the read speed of my hdd in hddtuner I see my +5v is dropping on 5.040v, does it mean my hdd only works on 5v not on 12v? but the specs of hdd are 12v and 5v, I don't have errors on my hdd except the interface crc error count is 91 because on my previous pc is shutting down when I formatting a pc because of cheap mobo and generic psu that lasted about 4 years, and I see my hdd is a little bit slower and sometimes the speed droping on 44mbs per but most of the time stable on 144 and 187 the maximum is there something wrong about my hdd? my pc is new with trusted mobo brand asus, my build is asus h110m-d and g4560 processor

 

[CountMike]

3.5" HDDs use 12VDc. Without it, platters wouldn't even start.

 

[Phillip Corcoran]

If your at all concerned about the health of your HDD you can test it at any time with the drive maker's diagnostic utility (HD Tune I don't rate very highly) - - - indeed it should be tested before even posting here so you have more meaningful information to post.

One big "to do" though before testing is to ensure that your data is backed up first.

If this WD HDD has Windows installed on it, test it with Data Lifeguard Diagnostic for DOS:

https://support.wdc.com/downloads.aspx?p=2