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Two matte black low profile DDR5 modules side by side

G.SKILL

G.SKILL F5-6400J3239G16GX2-RS5K 32GB DDR5 desktop RAM

SKU CH-MB5Q-ZDZGA MPN F5-6400J3239G16GX2-RS5K

A 32 GB dual-channel DDR5 kit at 6400 MT/s with CL32 timing, 1.40 V operation and a 33 mm low-profile heatspreader for compact builds

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • CAS latencyCL32
  • Memory timings32-39-39-102
  • Rated voltage1.4 V
  • Kit configurationDual Channel Kit

Capacity 32GB (2 x 16GB)

Speed DDR5 6400 (PC5 51200)

CAS Latency CL32

Color Black

  • DDR5 6400 speed enables faster data throughput for demanding workloads
  • CL32 latency with 32-39-39-102 timings delivers responsive performance in games and apps
  • 33 mm low-profile height fits compact builds and clears large CPU coolers
  • Intel XMP 3.0 profile applies rated speed and timings with a single BIOS selection
  • Hand-screened ICs validated under rigorous testing ensure stable operation at 1.40V

Ripjaws S5 DDR5 6400 Kit

This 32 GB kit contains two 16 GB DDR5 modules rated at 6400 MT/s with CL32 timings. Hand-screened ICs and a 1.40 V profile target enthusiasts who want high-speed memory for Intel 500 and 600 series platforms. Intel XMP 3.0 support lets the kit reach rated speed with a single BIOS selection.

Low-Profile Thermal Design

The matte black aluminum heat spreader measures 33 mm tall, clearing most large CPU coolers and compact chassis. Passive cooling keeps the modules stable at 1.40 V without adding fan noise or extra power draw beyond the rated voltage. The dual-channel configuration distributes load evenly across both sticks.

CL32 32-39-39-102 Timing

The primary latency of CL32 and the full 32-39-39-102 timing set define the kit's responsiveness in latency-sensitive workloads. Builders should verify that their motherboard and CPU memory controller can sustain DDR5 6400 at these timings before purchase.

How it compares

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

Price $421.99
Pricier than about 82% of the 3,647 comparable items (median $90.99).
Total capacity 32 GB (2 × 16 GB)
Higher than about 70% of the 3,251 comparable items (median 16 GB).
Price per GB $13.19 per GB
Pricier than about 81% of the 3,251 comparable items (median $6.75 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 nameG.SKILL
Product lineRipjaws S5 Series
Model nameF5-6400J3239G16GX2-RS5K
Total capacity32 GB (2 × 16 GB)
Product type288-Pin PC RAM
Product colorBlack
Performance
Rated speedDDR5 6400 (PC5 51200)
Memory
CAS latencyCL32
Memory timings32-39-39-102
Kit configurationDual Channel Kit
Memory profilesIntel XMP 3.0
Heat spreaderYes
Power
Rated voltage1.4 V
Size & build
Shipping weight0.12 kg
Package size218 × 142 × 13 mm
Compatibility
Recommended forHigh Performance or Gaming Memory / Intel 500 Series / Intel 600 Series / Intel B660 / Intel Compatible / Intel Z590 / Intel Z690

Other versions of this model

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Questions about this item

How do I install the 288-pin DDR5 modules and what step is often missed?

Insert each 16GB stick into the motherboard's DDR5 slots until the retention clips click; the step many miss is enabling the Intel XMP 3.0 profile in BIOS so the kit runs at its rated 6400 speed instead of the default SPD speed.

What maintenance or replacement will the Ripjaws S5 kit need over time?

The aluminium heatspreader requires only occasional dust removal with compressed air; the memory ICs themselves have no serviceable parts, so replacement is only needed if a module fails or you decide to upgrade capacity later.

What limit appears first during sustained heavy workloads on this DDR5 6400 memory?

The 1.40V operating voltage and CL32-39-39-102 timings mean thermal throttling or stability limits tied to the memory controller and cooling airflow will surface before the modules hit any rated ceiling.

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