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CORSAIR Vengeance RGB Pro 64GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 2666 (PC4 21300) Desktop Memory Model CMW64GX4M4A2666C16

Ships from United States.

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  • DDR4 2666 (PC4 21300)
  • Timing 16-18-18-35
  • CAS Latency 16
  • Voltage 1.2V

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Corsair CMW64GX4M4A2666C16

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): Lifetime
  • Limited Warranty period (labor): Lifetime
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: 1 week to 1 month
Verified Owner
5/ 5
NewEgg's Memory Finder shows this is compatible with ASUS ROG Maximus XI Hero (WI-FI). ASUS says no.

Pros: Looks great. Very Pretty. RGB syncs with the Motherboard and CPU Cooler fan.

Cons: Not sure about compatibility. Corsair CMW64GX4M4A2666C16 does not appear on the ASUS DDR4 2666 Qualified Vendors List (QVL) for memory.

Overall Review: While this Corsair CMW64GX4M4A2666C16 does not appear on the ASUS DDR4 2666 Qualified Vendors List (QVL), PCPartsPicker.com and Newegg's Memory Selector both show this as compatible with the ASUS ROG Maximus XI Hero (Wi-FI).

On my PC build I encountered boot issues with the ROG Maximus (Q-Code CC and Orange DRAM LED) with my initial configuration of all 4x16GB units mounted. I tried again with only one unit in A2. Same result. ASUS tech support reps at first suggested the problem was likely due to the non QVL RAM. So, I risked $100 on 2 8GB QVL approved units to experiment with and learned that with either RAM kit, only two of the 4 slots worked - B1 and B2.

So, I replaced the motherboard and bingo, the 64GB RAM kit seemed to work just fine. Now the question becomes, do I keep these or return them for the nearly twice as expensive ASUS QVL approved CMW64GX4M4K3600C18?

I opted to return this RAM and purchase the faster (helped in the justification) and more expensive ($799.99) CORSAIR Vengeance RGB Pro 64GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 3600 (PC4 28800) Desktop Memory Model CMW64GX4M4K3600C18 from Newegg.

For what it's worth, Bryan Wood at NewEgg Customer Service made the return and reorder process quick and painless.

Sadly the order for the replacement RAM was cancelled because it was out of stock. I ordered elsewhere and will have them tomorrow.

Also, I'm pretty sure the original RAM was just fine. After spending time reviewing ASUS QVL for devices, I've come to the conclusion that these lists don't get updated very often. Nothing but the Corsair case and one of my Samsung 970 EVO SSDs is on that list.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Amazing Quality Part

Pros: It's blazing fast, maxed out my board with this set and running on XMP @ 2666MHz like a champ. The RGB is a sleek touch and they are quite bright depending on which settings you use. With iCue you can dim them or put them at max brightness along with other features.

Cons: None as of yet.

Overall Review: Intel i7-9700K (OC'd @ 5GHz)
Corsair H100i RGB Platinum (Cooler)
MSI MAG z390 Tomahawk (Motherboard)
4x16GB Corsair Vengeance RGB Pro DDR4 2666MHz (64GB of RAM)
Samsung 970 EVO SSD M.2 2280 (2TB)
Gigabyte Aorus GeForce RTX 2070 Extreme 8GB GDDR6
EVGA SuperNova 1000 P2 (1000W Fully Modular)
Corsair Crystal Series 570X (Case)

2 out of 2 people found this review helpful. Did you?
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    • CORSAIR Vengeance RGB Pro 64GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 2666 (PC4 21300) Desktop Memory Model CMW64GX4M4A2666C16
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    Ships from United States.
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  • Twinix

    10 (80% Positive)

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    Ask Twinix about:
    • CORSAIR Vengeance RGB Pro 64GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 2666 (PC4 21300) Desktop Memory Model CMW64GX4M4A2666C16
    • We won't share your email with anybody. We'll only use your
      email to contact you
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    Ships from Italy.
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  • Used - Acceptable : This means that the product shows clear signs of use, cosmetic defect, and may be missing minor accessories and manual, but remain in working condition. Product does not come with warranty unless stated otherwise in product description. Functionality issues beyond signs of use should be disclosed in product description.
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