Difference between WD Green 3TB Drives

What’s the difference between these WD drives: WD30EZRX,  WD30EZRSDTL and WDBAAY0030HNC-ERSN ?

They all have:

  • IntelliPower
  • 64MB Cache
  • 4KB sectors

I’am a little bit confused !

The “X” in “WD30EZRX” denotes a 6Gbps SATA interface speed, while the “S” in “WD30EZRS” denotes 3Gbps.

“WDBAAY0030HNC” is the model number for a retail kit (as opposed to a bare drive). I’m not certain, but I suspect that you may get either of the 3Gbps or 6Gbps models in the kit.

Model Numbers - WD Internal Drives:


I also intend to buy a new Green drive and was really looking for some information differentiating the various AV / AV-GP / RS / and so on designations.

Thank you!