Anyone out there running this on an Asus ROG STRIX X-370-F? Thinking about upgrading, but I want to be sure it's compatible.

I would check with the motherboard manufacturer website for approved compatibility memory list. Asus dot com /us/Motherboards/ROG-STRIX-X370-F-GAMING/HelpDesk_CPU/

Why does the page not display what type of memory this is?

If you look at the breadcrumb path, it correctly indicates: Memory > Desktop Memory... If you're having trouble understanding, maybe you should consider buying a pre-built computer.

asus qvl specifies Ver4.31 Do these match?

Yes, I used them with ASUS Ramepage V Extreme and working the way they should.

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Main image of CORSAIR Vengeance LPX 64GB (4 x 16GB) 288-Pin PC RAM DDR4 2666 (PC4 21300) Desktop Memory Model CMK64GX4M4A2666C16

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CORSAIR Vengeance LPX 64GB (4 x 16GB) 288-Pin PC RAM DDR4 2666 (PC4 21300) Desktop Memory Model CMK64GX4M4A2666C16

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Designed for high-performance overclocking
Designed for great looks
Performance and Compatibility
Low-profile heatspreader design

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Overview

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Vengeance LPX Series Vengeance LPX memory is designed for high-performance overclocking. The heatspreader is made of pure aluminum for faster heat dissipation, and the eight-layer PCB helps manage heat and provides superior overclocking headroom.

Model
Brand	CORSAIR
Series	Vengeance LPX
Model	CMK64GX4M4A2666C16

Details
Capacity	64GB (4 x 16GB)
Type	288-Pin PC RAM
Speed	DDR4 2666 (PC4 21300)
CAS Latency	CL16
Timing	16-18-18-35
Voltage	1.20V
ECC	No
Buffered/Registered	Unbuffered
Chipset	AMD X399 Compatible
Color	Black
Heat Spreader	Anodized Aluminum
Features	Designed for high-performance overclocking Each Vengeance LPX module is built with a pure aluminum heatspreader for faster heat dissipation and cooler operation; and the eight-layer PCB helps manage heat and provides superior overclocking headroom. Each IC is individually screened for performance potential. Designed for great looks Available in multiple colors to match your motherboard, your components, or just your style. Performance and Compatibility Vengeance LPX is optimized and compatibility tested for the latest Intel X99 and 100 Series motherboards and offers higher frequencies, greater bandwidth, and lower power consumption. XMP 2.0 support for trouble-free automatic overclocking. Low-profile heatspreader design The Vengeance LPX module height is carefully designed to fit smaller spaces.
Recommend Use	High Performance or Gaming Memory

Additional Information
First Listed on Newegg	October 16, 2015

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Limited Warranty period (parts): Lifetime
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CORSAIR Vengeance LPX 64GB (4 x 16GB) 288-Pin PC RAM DDR4 2666 (PC4 21300) Desktop Memory Model CMK64GX4M4A2666C16

Learn more about the Corsair CMK64GX4M4A2666C16

Customer Reviews of the Corsair CMK64GX4M4A2666C16

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16820233891

CORSAIR Vengeance LPX 64GB (4 x 16GB) 288-Pin PC RAM DDR4 2666 (PC4 21300) Desktop Memory Model CMK64GX4M4A2666C16

Learn more about the Corsair CMK64GX4M4A2666C16

Customer Reviews of the Corsair CMK64GX4M4A2666C16

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info