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G.SKILL Ripjaws S5 Series DDR5 RAM (Intel XMP 3.0) 32GB (2x16GB) 6400MT/s CL32-39-39-102 1.40V Desktop Computer Memory U-DIMM - Matte Black (F5-6400J3239G16GX2-RS5K)
G.SKILL

G.SKILL Ripjaws S5 Series DDR5 RAM (Intel XMP 3.0) 32GB (2x16GB) 6400MT/s CL32-39-39-102 1.40V Desktop Computer Memory U-DIMM - Matte Black (F5-6400J3239G16GX2-RS5K)

Bottom line: The G.SKILL Ripjaws S5 Series DDR5 RAM: 6400MT/s via Intel XMP 3.0, far above the DDR5 JEDEC baseline; main trade-off: intel XMP only; no AMD EXPO profile for Ryzen builds.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For desktop and laptop memory upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ 6400MT/s via Intel XMP 3.0, far above the DDR5 JEDEC baseline
  • ✓ Tight CL32-39-39-102 timings for a DDR5-6400 kit
  • ✓ Reaches rated 6400 speed at just 1.40V
  • ✓ QVL-validated for Intel Z890, Z790, B860 and B760 boards

Cons

  • ✗ Intel XMP only; no AMD EXPO profile for Ryzen builds
  • ✗ 32GB (2x16GB) may be tight for heavy multitasking or content work
  • ✗ 6400 speed needs XMP enabled in BIOS, not plug-and-play
  • ✗ Matched 2x16GB kit only; mixing with other modules risks instability

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SpecPicks Verdict

SpecPicks scored G.SKILL Ripjaws S5 Series DDR5 RAM (Intel XMP 3.0) 32GB (2x16GB)… using a rating × review-volume × price-fit model applied to published specs and reviews across the memory (ram) category. G.SKILL's memory (ram) lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for memory (ram) of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • G.SKILL Ripjaws S5 Series DDR5 U-DIMM Memory Kit, Model: F5-6400J3239G16GX2-RS5K
  • 32GB total capacity kit containing 2x16GB modules, rated for up to DDR5-6400 CL32-39-39-102 at 1.40V
  • Non-ECC, DDR5 U-DIMM, 288-pin, for Desktop PC & Gaming
  • Includes JEDEC default profile, and Intel XMP 3.0 memory overclock profile
  • Do not mix memory kits. Memory kits are sold in matched kits that are designed to run together as a set. Mixing memory kits will result in stability issues or system failure.
  • For Intel Z890, Intel Z790, Intel B860, Intel B760 platforms. Refer to G.SKILL memory QVL or RAM Configurator tool on the G.SKILL website for more details on validated motherboard and hardware.

Full Specifications

BrandG.SKILL
Voltage1.4 volts
RAM Size32 GB
Model NameRipJaws S5
Unit Count1 count
Form FactorDIMM
Memory Speed6400 mt_s
Model NumberF5-6400J3239G16GX2-RS5K
CompatibilityPC
Built-In Media1 package
Item Type NameDDR5 6400
Number of Pins288
Mfr Part NumberF5-6400J3239G16GX2-RS5K
Number of Items2
Memory GenerationDDR5
Compatible DevicesDesktop
Data Transfer Rate6400 MHz
Memory Form FactorUDIMM
Additional FeaturesIntel XMP 3.0
Computer Memory Size32 GB

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G.SKILL Ripjaws S5 Series DDR5 RAM (Intel XMP 3.0) 32GB (2x16GB) 6400MT/s CL32-39-39-102 1.40V Desktop Computer Memory U-DIMM - Matte Black (F5-6400J3239G16GX2-RS5K) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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G.SKILL Ripjaws S5 Series DDR5 RAM (Intel XMP 3.0) 32GB (2x16GB) 6400MT/s CL32-39-39-102 1.40V Desktop Computer Memory U-DIMM - Matte Black (F5-6400J3239G16GX2-RS5K)
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