Buying for an ACER Aspire 5 Slim. Are these specs close enough to match what is in the laptop? This is from the label on the chip I have. 407745 Product of Malaysia E443457C CT16G4SFS8266.C8FB 16GB DDR4-2666 SODIMM 1.2V CL19

Yes, the specifications of the Crucial 16GB 260-Pin DDR4 SO-DIMM DDR4 2666 (PC4 21300) Laptop Memory Model CT16G4SFS8266 match what you have mentioned. It has a capacity of 16GB, a speed of DDR4 2666 (PC4 21300), a CAS Latency of 19, and operates at 1.20V.

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Crucial 16GB 260-Pin DDR4 SO-DIMM DDR4 2666 (PC4 21300) Laptop Memory Model CT16G4SFS8266

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DDR4 2666 (PC4 21300)
CAS Latency 19
1.20V

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Best Seller Ranking	#100 in Laptop Memory

Model
Brand	Crucial
Model	CT16G4SFS8266

Details
Capacity	16GB
Type	260-Pin DDR4 SO-DIMM
Speed	DDR4 2666 (PC4 21300)
CAS Latency	CL19
Timing	19-19-19
Voltage	1.20V
ECC	No
Buffered/Registered	Unbuffered
Heat Spreader	No
Features	Single Ranked • x8 based • 2048Meg x 64

Additional Information
First Listed on Newegg	June 17, 2024

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