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Green circuit board laptop memory module with black chips and silver contacts

Kingston Technology Corp.

Kingston Technology Corp. KF556S40IB-16 16GB DDR5 5600 CL40 laptop RAM

SKU CH-MX9G-5VS7R MPN KF556S40IB-16

16 GB DDR5 SO-DIMM running at 5600 MT/s with CL40 latency and 1.10 V operation

  • Total capacity16 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL40
  • Memory timings40-40-40
  • Rated voltage1.1 V
  • Recommended forAMD & Intel Compatible / AMD Ryzen Compatible / High Perform
  • 16 GB DDR5 5600 MT/s for faster multitasking
  • CL40 latency and 1.10 V for responsive low-power operation
  • 262-pin SO-DIMM fits DDR5 laptop slots
  • Plug N Play auto-overclock to 5600 MT/s without BIOS changes
  • Intel XMP 3.0 certified profile for supported platforms

What it is and who it fits

This is a 16GB DDR5 SO-DIMM module rated at 5600 MT/s with CL40 latency. It targets notebook and small-form-factor builders who need a single 16GB stick for AMD Ryzen or Intel platforms. The 262-pin layout fits standard DDR5 laptop slots.

Sustained-load behaviour

Operating at 1.10V, the module maintains its rated speed without the voltage headroom required for higher frequencies. On-die ECC helps preserve data integrity during long rendering or multitasking sessions. Plug N Play allows automatic configuration at the highest supported JEDEC speed.

The deciding specification

The 5600 MT/s speed grade determines whether this module matches your platform's maximum supported memory frequency. Systems limited to 4800 MT/s will downclock the stick, while boards capable of 6400 MT/s via XMP 3.0 can run it faster when the profile is enabled.

How it compares

Measured against everything we stock in Laptop RAM, at today’s prices. Recalculated every night.

Price $53.99
Cheaper than about 57% of the 2,079 comparable items (median $70.99).
Total capacity 16 GB
Typical for this category: the median of 1,886 items is 16 GB.
Price per GB $3.37 per GB
Cheaper than about 88% of the 1,886 comparable items (median $5.94 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameKingston
Product lineFURY Impact
Model nameKF556S40IB-16
Part numberKF556S40IB-16
Total capacity16 GB
Product type262-Pin DDR5 SO-DIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL40
Memory timings40-40-40
ECC supportNo
Power
Rated voltage1.1 V
Size & build
Shipping weight0.16 kg
Package size381 × 177 × 76 mm
Compatibility
Recommended forAMD & Intel Compatible / AMD Ryzen Compatible / High Performance or Gaming Memory / Intel Compatible

Questions about this item

Does the 1.10 V DDR5 module run cooler than a typical DDR4 stick?

DDR5 at 1.10 V draws less power than DDR4, so the system stays cooler and more efficient during long sessions.

Will this 262-pin DDR5 SO-DIMM fit my laptop that currently uses DDR4 memory?

No — DDR5 uses a different pin layout and key notch, so it only works in slots designed for DDR5.

Can I pair this CL40 DDR5 5600 stick with an older DDR4 module for more capacity?

No, DDR5 and DDR4 are electrically and physically incompatible and cannot be mixed in the same system.

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