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Two green DDR4 SODIMM sticks, 260-pin, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM4096642400SO 64GB (2×32GB) DDR4 2400 SODIMM Panasonic Toughbook 55 FZ-55

SKU CH-SDC4-928MS

A 64GB dual-channel kit of two 32GB DDR4 2400 SO-DIMM modules validated for the Panasonic Toughbook 55 FZ-55

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL17
  • Memory timings17-17-17
  • Rated voltage1.2 V
  • 64 GB total capacity from two 32 GB modules
  • DDR4 2400 speed rated at PC4 19200
  • Low 1.2 V operation reduces power draw
  • CL17 latency with 17-17-17 timing
  • Validated for Panasonic Toughbook 55 FZ-55

64GB DDR4 2400 SODIMM Kit for Toughbook 55

This 64GB kit contains two 32GB DDR4 2400 SODIMM modules built for the Panasonic Toughbook 55 FZ-55. Each stick is a 260-pin unbuffered non-ECC DIMM rated at CL17 17-17-17 timing and 1.2V. The kit fills both memory slots to reach the platform maximum of 64GB.

Suits users upgrading a Toughbook 55 FZ-55 to full

The kit is designed specifically for that model and will not fit laptops that require a different pin count, voltage or DDR generation. Buyers who need ECC or registered memory should look elsewhere, as these modules are non-ECC and unbuffered. Systems limited to 32GB maximum or a single slot cannot use the full kit.

Check that your Toughbook 55 FZ-55 has two free

Verify the laptop currently runs DDR4 2400 or faster memory so the new modules operate at their rated speed. Confirm the system uses a 64-bit operating system to address more than 4GB of RAM. Ensure the BIOS is up to date for full compatibility with 32GB density modules.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $270.99
Cheaper than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $4.23 per GB
Cheaper than about 83% of the 20,941 comparable items (median $8.19 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 nameComputer Memory Solutions
Model nameCM4096642400SO
Total capacity64 GB (2 × 32 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL17
Memory timings17-17-17
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsPanasonic Toughbook 55 FZ-55
In the box
Included items2 Memory RAM Sticks

Questions about this item

Does my Panasonic Toughbook 55 FZ-55 need two free 260-pin SODIMM slots to install this 64GB kit?

Yes, the kit contains two 32GB modules and the Toughbook 55 FZ-55 has two SODIMM sockets, so both slots must be available for the full 64GB upgrade.

If I keep one original 32GB module and add one 32GB stick from this kit, what speed will the memory run at?

All installed memory will run at the slowest module's speed; mixing a slower original stick with these DDR4 2400 CL17 modules will downclock the kit to match the original.

How can I verify the system recognises the full 64GB capacity after installation?

Boot into a 64-bit operating system and check Task Manager or System Information; it should report 64GB of usable memory running at 2400 MHz with CL17 timings.

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