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Eight green DDR5 RDIMMs with black heat spreaders and copper micro heatsinks

V-color

V-color WRX90 OC R-DIMM 128GB (16GBx8) DDR5 6600 CL34 1.4V ECC Registered AMD EXPO

SKU CH-77E6-A2SRP

An 128GB DDR5 RDIMM kit of eight 16GB modules running at 6600MHz CL34 with ECC and AMD EXPO for Threadripper WRX90 workstations

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 6600 (PC5 52800)
  • ChipsetSK Hynix IC
  • CAS latencyCL34
  • Memory timings34-46-46-92
  • Rated voltage1.4 V

Capacity 128GB (8 x 16GB)

Speed DDR5 6600 (PC5 52800)

  • ECC safeguards data integrity on critical workloads
  • 128 GB capacity handles large datasets and virtualization
  • DDR5 6600 CL34 timing accelerates memory-bound tasks
  • Patented RCD and PMIC micro-heatsinks lower module temperatures 30-40%
  • AMD EXPO profile enables one-click overclocking on WRX90 platforms

WRX90 workstation memory kit

This 128 GB kit delivers eight 16 GB DDR5 registered DIMMs built for AMD Threadripper PRO 7000 series workstations. ECC protection and registered buffering keep data integrity intact during sustained compute loads. The modules target professional users who need maximum capacity on WRX90 motherboards.

AMD EXPO 6600 MT/s profile

The single specification that decides fit is the AMD EXPO profile rated at 6600 MT/s with CL34 timings at 1.4 V. WRX90 boards must support this exact EXPO profile for the kit to run at its rated speed without manual tuning. Systems limited to lower JEDEC speeds will not reach 6600 MT/s automatically.

Straightforward DIMM installation

The 288-pin RDIMMs seat like standard DDR5 modules; align the notch, press evenly until the latches click, and enable the EXPO profile in BIOS. The only common issue is populating all eight slots on a WRX90 board that has not validated the full 128 GB EXPO configuration, which can prevent the profile from applying.

How it compares

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

Price $4,031.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.50 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameV-Color
Product lineWRX90 OC R-DIMM
Model nameTRA516G66S834O
Part numberTRA516G66S834O
Total capacity128 GB (8 × 16 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6600 (PC5 52800)
Processor
ChipsetSK Hynix IC
Memory
CAS latencyCL34
Memory timings34-46-46-92
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Memory profilesAMD EXPO
Heat spreaderYes
Power
Rated voltage1.4 V
Compatibility
Compatible systemsAMD Threadripper - WRX90 Workstation Motherboards

Other versions of this model

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Questions about this item

What does the 6600 MHz speed mean once the kit is installed in a WRX90 workstation?

The modules run at DDR5 6600 (PC5 52800) with AMD EXPO, delivering the rated frequency on Threadripper PRO 7000 series CPUs without manual tuning.

How does the registered ECC design and 1.4 V voltage affect stability on a WRX90 board?

Registered buffering and on-die ECC protect data integrity at 6600 MHz, while the 1.4 V EXPO profile stays within the platform's supported voltage range.

Will the 288-pin RDIMM sticks with the micro-heatsink fit my WRX90 motherboard's DIMM slots?

Yes — they are standard 288-pin DDR5 RDIMMs with a low-profile copper-alloy micro-heatsink designed for WRX90 workstation boards.

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