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Two black 288-pin DDR5 modules with low-profile 33mm matte heatspreaders

G.SKILL

G.SKILL F5-6400J3239G32GX2-RS5K 64GB DDR5 desktop RAM

SKU CH-AAE0-7B9WJ MPN F5-6400J3239G32GX2-RS5K

A 64GB dual-channel DDR5 kit with 6400 speed, CL32 timing and 33mm low-profile heatspreaders

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • CAS latencyCL32
  • Memory timings32-39-39-102
  • Rated voltage1.4 V
  • Kit configurationDual Channel Kit

Capacity 64GB (2 x 32GB)

Speed DDR5 6400 (PC5 51200)

CAS Latency CL32

Color Black

  • High-speed DDR5 6400 performance with CL32 latency
  • 64 GB dual-channel kit for demanding workloads
  • 33 mm low-profile height fits large CPU coolers
  • Intel XMP 3.0 profile enables rated speed automatically
  • Red Dot Design Award 2022 recognised styling

Ripjaws S5 64GB DDR5 kit

This Ripjaws S5 kit delivers 64GB of DDR5 memory in a dual-channel 2 x 32GB configuration. It is built for DIY builders and PC enthusiasts who need high-speed desktop memory. The modules use hand-screened ICs validated for stability and compatibility. A matte black aluminium heatspreader keeps the memory running cool.

33mm low-profile heatspreader

The 33mm module height fits compact chassis and clears large CPU coolers without interference. Intel XMP 3.0 support lets the kit load its rated profile from the BIOS with a single setting. At default BIOS settings the memory boots at standard SPD speed. The Red Dot Design Award 2022 recognises the minimalist racing-stripe aesthetic.

CL32 6400MT/s at 1.40V

The kit runs at DDR5 6400 (PC5 51200) with timings of 32-39-39-102 and a CAS latency of CL32. Operation at the rated speed requires 1.40V, so the motherboard and CPU must support that voltage. Verify platform capability before purchase to ensure the memory reaches its specified performance.

How it compares

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

Price $1,590.99
Pricier than about 90% of the 3,647 comparable items (median $90.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 90% of the 3,251 comparable items (median 16 GB).
Price per GB $24.86 per GB
Pricier than about 90% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameG.SKILL
Product lineRipjaws S5 Series
Model nameF5-6400J3239G32GX2-RS5K
Total capacity64 GB (2 × 32 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 × 15 mm
Compatibility
Recommended forIntel 700 Series

Other versions of this model

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Questions about this item

Will the 33mm low-profile heatspreader on this Ripjaws S5 kit need any thermal paste replacement over time?

The aluminum heatspreader is a passive component with no moving parts or thermal paste, so it does not require any maintenance or replacement during the life of the modules.

At the rated 1.40V and CL32-39-39-102 timings, what is the first limit reached during sustained heavy workloads?

The first limit is the 1.40V operating voltage; the modules are validated to run continuously at this level with the XMP 3.0 profile active.

How much heat and noise does the 64GB dual-channel kit produce when running all day at DDR5 6400?

The passive 33mm heatspreaders dissipate heat silently with zero noise, and power draw stays at the specified 1.40V level during continuous operation.

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