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WD40E31X 14

WD Blue (WD40E31X) 4TB PC SSHD Review

  1. Introduction
  2. Test Setup and Methodology
  3. AS SSD and ATTO Benchmark
  4. ATTO Benchmark
  5. Futuremark Benchmark
  6. AIDA64 Disk Access Test
  7. Sequential Data Performance Test
  8. Random Data Performance Test
  9. Transfer Tests
  10. Conclusion
  11. Online Purchase Links
  12. View All

Disclosure: This review unit is supplied by WD

WD phased out its Green series drives. But at the same time, WD Blue series now has a desktop SSHD drive lineup. This is the WD4031X Blue drive with 4TB drive storage capacity. This drive uses 8GB MLC NAND and a 64MB Cache.

WD40E31X 14

As per WD, this drive uses a set of algorithms which tracks data usage and prioritizes part of the data which is frequently used using the 8GB NAND. One of such uses (as WD highlighted) is for gaming. With this algorithm and the 8GB NAND, it would provide lesser loading times compared to traditional hard drives. With a much larger capacity and value still towards mechanical drives (for now), gamers can keep a large amount of games stored away in the drive.

Fair enough.

SSHD concept isn’t something new. Both Seagate and WD have released its own variants in 2.5” and 3.5” form factors.

  • Specifications4 TB
    Hard Drive TypeWD Blue SSHD
    Model NumberWD40E31X
    InterfaceSATA 6 GB/s
    Formatted Capacity4 TB
    Form Factor3.5-inch
    Advanced Format (AF)Yes
    ROHS CompliantYes
    Data transfer rate (max)
    Buffer to host6 GB/s
    Host to/from drive (sustained)150 MB/s
    NAND TypeMLC
    NAND Size (GB)8
    Cache (MB)64
    Reliability/Data Integrity
    Load/unload cycles300,000
    Non-recoverable read errors per bits read<1 in 10¹⁴
    Limited warranty (years)3
    Power Management
    Spinup (Max) 12VDC ±10% (A, peak)2.8
    Spinup (Max) 5VDC ±10% (A, peak)1
    Spinup (Max) (W)38.6
    Average power requirements (W)
    Standby and Sleep0.57
    Environmental Specifications
    Non-operating0 to 60
    Shock (Gs)-40 to 70
    Operating (2 ms, read/write)30
    Non-operating (2 ms)350
    Acoustics (dBA)
    Seek (average)26
    Physical Dimensions
    Height (in./mm, max)1.028/25.4
    Length (in./mm, max)5.787/147
    Width (in./mm, ± .01 in.)4/101.6
    Weight (lb./kg, ± 10%)0.99/0.45
  • WD40E31X CDI
  • WD40E31X HDD Properties

This is a 5400RPM drive and you get a usable space of 3.63TB. The operating temperature ratings is up to 60 degrees Celsius. This is good considering it can be used in mini-ITX systems even with restricted airflow and even in gaming consoles that have 3.5” bay internally- like the PlayStation 4.

There’s a thin foam between the drive and the PCB to dampen any vibration in between when in use. There’s a small thermal pad on one of the chips on the PCB.

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