WD Black 1TB Hiccups in OS/Games

My WD1002FAEX-00Z3A0 (Western Digital 1TB Caviar Black 7200 64MB SATAIII (WD1002FAEX))

Seems to make stutters

when my transfers just drop to the point where it’s only at 1,3 MB/s

It’s normal? It’s the sign that my HDD is dying, or I can fix it somehow? It’s irritating to the point that I\m getting constant stuttering in games and OS every time when the transfer rate drops… should I RMA? or it’s something that I can fix by myself?

for the comparison this is my old WD Green disk which I only use as backup so that’s why I’m worried about my WD Black…

Another test with the new SATA cable and after reboot, and it’s even worse…

Image

You should run drive test using Data Lifeguard Diagnostic tool provided by Western Digital to check for the health of drive.

https://support.wdc.com/knowledgebase/answer.aspx?ID=940