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Two black DDR5 SO-DIMM modules with silver heatspreaders and gold contacts

G.SKILL

G.SKILL Ripjaws F5-4800S4039A32GX2-RS 64GB (2x32GB) DDR5 4800 CL40 laptop RAM

SKU CH-CKZB-GXK0Q MPN F5-4800S4039A32GX2-RS

A 64GB dual-channel DDR5 SO-DIMM kit running at 4800MT/s with CL40 latency at 1.10V

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC4 38400)
  • CAS latencyCL40
  • Memory timings40-39-39-76
  • Rated voltage1.1 V
  • Buffer typeUnbuffered

Capacity 64GB (2 x 32GB)

Speed DDR5 4800 (PC4 38400)

CAS Latency CL40

  • 64 GB dual-channel kit for high-capacity multitasking
  • DDR5 4800 speed for fast data transfer
  • CL40 latency with 40-39-39-76 timings
  • 10 V operation for improved energy efficiency
  • 262-pin SO-DIMM form factor fits compatible laptops

Ideal DDR5 laptop upgrade

This 64GB dual-channel kit contains two 32GB SO-DIMM modules built for laptops and small form-factor PCs. It delivers DDR5 4800 speeds with CL40 latency at 1.10V for efficient high-speed performance. The kit targets Intel 600 Series platforms requiring unbuffered non-ECC memory.

Matched kit stability

Modules are screened and binned together to run as a matched set with 40-39-39-76 timings. The manufacturer warns against mixing this kit with other memory to avoid stability issues or system failure. Using the paired modules ensures reliable operation at the rated specification.

262-pin DDR5 form factor

The 262-pin SO-DIMM interface determines physical compatibility with DDR5 laptop slots only. It will not fit DDR4 or older sockets. Verify your platform accepts 262-pin DDR5 SO-DIMMs before purchase.

How it compares

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

Price $617.99
Pricier than about 91% of the 2,079 comparable items (median $70.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 91% of the 1,886 comparable items (median 16 GB).
Price per GB $9.66 per GB
Pricier than about 78% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameG.SKILL
Product lineRipjaws SO-DIMM
Model nameF5-4800S4039A32GX2-RS
Total capacity64 GB (2 × 32 GB)
Product type262-Pin DDR5 SO-DIMM
Performance
Rated speedDDR5 4800 (PC4 38400)
Memory
CAS latencyCL40
Memory timings40-39-39-76
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Power
Rated voltage1.1 V
Size & build
Shipping weight0.05 kg
Package size160 × 140 × 13 mm
Compatibility
Recommended forIntel 600 Series

Other versions of this model

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Questions about this item

Will the 262-pin DDR5 modules need any firmware updates or re-timing after installation?

No firmware updates are required; the kit runs at its rated DDR5 4800 CL40 40-39-39-76 timings and 1.10V from the SPD profile.

What limits sustained throughput first — the 4800 MT/s data rate or the CL40 latency?

The 4800 MT/s transfer rate sets the peak bandwidth ceiling; CL40 40-39-39-76 timings determine access latency within that bandwidth.

How much heat and power does the 64 GB dual-channel kit produce at 1.10 V during all-day workloads?

Operating at 1.10 V keeps power draw low; the unbuffered DDR5 SO-DIMMs run cool enough for typical laptop thermal envelopes.

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