WD10EZRX very very slow

My WD10EZRX is 1261 hours old, since I first installed as DATA disk (my PC boot W7 SSD disk), it is terriblu SLOW when

retrieving asked data.

I checked it searching problems but none has been detected.

Really disappointed, don’t know what to do except throw it & change for a Black one

Advice is thanked in advance

Can you show us a HD Tune read benchmark graph? SMART data?