Is this genuine Crucial product Model # CT16G4RFD4266 ?

Yes it was when I purchased in March of this year. Been running in a NAS 24/7 with no issues.

Will this memory work for Dell PowerEdge Server T40 ?

The product specifications mention that it is compatible with OEM servers and OEM warranties.

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This item is currently out of stock and it may or may not be restocked.

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Crucial 16GB ECC Registered DDR4 2666 (PC4 21300) Server Memory Model CT16G4RFD4266

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DDR4 2666 (PC4 21300)
ECC Registered
CAS Latency 19

Overview

Specs

Reviews (3)

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MAIN OVERVIEW FEATURES: Memory Size: 16 GBMemory Technology: DDR4 SDRAMMemory Voltage: 1.20 VNumber of Modules: 1 x 16 GBMemory Speed: 2666 MHzMemory Standard: DDR4-2666/PC4-21300Error Checking: ECCSignal Processing: RegisteredCAS Latency: CL19Device Supported: Desktop PC,ServerNumber of Pins: 288-pinForm Factor: DIMM

Model
Brand	Crucial
Model	CT16G4RFD4266

Details
Capacity	16GB
Type	288-Pin DDR4 SDRAM
Speed	DDR4 2666 (PC4 21300)
CAS Latency	CL19
Voltage	1.20V
ECC	Yes
Buffered/Registered	Registered
Rank	2Rx4
Chipset	Micron Chipset

Features
Features	Increase server performance Optimized for the latest Intel Xeon processor product families Compatible with OEM servers and OEM warranties 100% component and module tested to mission-critical server standards

Additional Information
First Listed on Newegg	December 27, 2018

Warranty & Returns

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 30-Day Return Policy. Read full return policy for details.

Crucial 16GB ECC Registered DDR4 2666 (PC4 21300) Server Memory Model CT16G4RFD4266

Learn more about the Crucial CT16G4RFD4266

Customer Reviews of the Crucial CT16G4RFD4266

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16820156184

Crucial 16GB ECC Registered DDR4 2666 (PC4 21300) Server Memory Model CT16G4RFD4266

Learn more about the Crucial CT16G4RFD4266

Customer Reviews of the Crucial CT16G4RFD4266

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info