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Rectangular 2.5 inch SATA SSD with black metal casing and silver label

Kingston Technology Corp.

Kingston Technology Corp. SSDNow KC400 SKC400S37/256G 2.5" 256GB SATA enterprise SSD

SKU CH-0DJB-QA239

2.5-inch SATA solid-state drive with 256 GB capacity, up to 550 MB/s read and 540 MB/s write, plus 88,000 read and 89,000 write IOPS

  • Total capacity256 GB
  • Sequential read speedUp to 550 MB/s
  • Sequential write speedUp to 540 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Controller chipPhison 3110

Model 256GB Single Drive

  • Faster boot and load times with up to 550 MBps sequential read
  • Responsive multitasking backed by up to 88,000 IOPS random read
  • Reliable long-term operation with 1,000,000 hours MTBF
  • Low power draw at 0.255W idle for cooler running
  • Compact 2.5 inch 7.00mm height fits standard drive bays

Enterprise SATA III SSD

The Kingston SSDNow KC400 SKC400S37/256G is a 2.5 inch enterprise solid state drive with a 256GB capacity. It connects via the SATA III interface and uses a Phison 3110 controller. This drive targets business environments that require reliable storage for mixed read and write workloads.

Sustained workload behaviour

Sequential write speeds reach up to 540 MBps while random write performance hits 89,000 IOPS. Active power draw during write operations is 3.740W, rising from 1.220W during reads. The drive operates between 0°C and 70°C and withstands 2.17G peak vibration while running, supporting continuous operation in standard server bays.

SATA III interface limits

The SATA III interface caps sequential throughput at 550 MBps read and 540 MBps write, which this drive saturates. Random 4KB performance tops out at 88,000 read and 89,000 write IOPS. The 7mm height fits standard 2.5 inch drive bays, but the interface bandwidth prevents higher throughput than the stated maximums.

How it compares

Measured against everything we stock in Server & Data Center SSDs, at today’s prices. Recalculated every night.

Price $139.99
Cheaper than about 94% of the 1,039 comparable items (median $992.99).
Total capacity 256 GB
Lower than about 94% of the 522 comparable items (median 3.2 TB).
Sequential read speed Up to 550 MB/s
Lower than about 80% of the 311 comparable items (median 6,500 MB/s).
Price per TB $546.84 per TB
Cheaper than about 55% of the 522 comparable items (median $595.64 per TB).

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Specifications

Product
Brand nameKingston
Product lineSSDNow KC400
Model nameSKC400S37/256G
Total capacity256 GB
Performance
Sequential read speedUp to 550 MB/s
Sequential write speedUp to 540 MB/s
Random read (4K)Up to 88,000 IOPS
Random write (4K)Up to 89,000 IOPS
Storage
Controller chipPhison 3110
Ports & slots
Interface typeSATA III
Power
Idle power draw0.255 W
Active power draw1.22 W (Read)
3.74 W (Write)
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width69.85 mm
Product depth100 mm
Product weight60g
Environment & compliance
Operating temperature range0 °C to 70 °C
Storage temperature range-40 °C to 85 °C
Vibration toleranceOperating: 2.17G Peak (7-800 Hz)
Non-operating: 20G Peak (10-2000 Hz)
More details
Mean time between failures1,000,000 h

Other versions of this model

1 more in the same range

Questions about this item

How much power does the SSDNow KC400 draw when reading or writing continuously all day?

The drive uses 1.220W during read operations and 3.740W during write operations, with an idle draw of 0.255W.

Does the 2.5" SATA III KC400 need any adapter or bracket to fit my server bay?

It fits any standard 2.5" SATA drive bay or hot-swap tray; no extra adapter is required beyond the SATA data and power cables.

Will the Phison 3110 controller on this 256GB drive work with a SATA II backplane I still use?

Yes, the SATA III interface is backward compatible with SATA II ports, though sequential speeds will be limited to the older link rate.

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