Will this work on an HP Mini 210-1084NR?

I'm not personally familiar with your system, but after looking it up online, while 1 HP site lists it as having a 1GB maximum memory capacity, several others say it can handle 2GB. That said, you'd be better off looking for 200 pin DDR2 SO-DIMMs rated PC2-6400 (200 MHz) rather than 166 MHz (PC2-5300) chips like these -- the increase in capacity would be offset by the loss in speed, resulting in negligible performance change.

is the quantity 2 or just 1 stick of ram??

I ordered this to upgrade my laptop, and the 2GB is just one stick. I ordered two of them for a total of 4GB (2 sticks). Haven't had any issues with it - works great in my laptop.

will these work in a OptiPlex 755 dell computer?

No, that is laptop memory. OptiPlex 755 is a desktop.

Auusda EXSURF 15.6" Laptop Computer, AMD 3050E CPU, 32GB RAM 1TB SSD, Fingerprint, Backlit Keyboard, Windows 11 Pro Home Notebook, Silver

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Kingston 2GB 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop Memory Model KVR667D2S5/2G

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DDR2 667 (PC2 5300)
CAS Latency 5
1.8V

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Model
Brand	Kingston
Model	KVR667D2S5/2G

Details
Capacity	2GB
Type	200-Pin DDR2 SO-DIMM
Speed	DDR2 667 (PC2 5300)
CAS Latency	CL5
Voltage	1.80V
ECC	No
Buffered/Registered	Unbuffered
Heat Spreader	No

Additional Information
First Listed on Newegg	November 07, 2024

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Kingston 2GB 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop Memory Model KVR667D2S5/2G

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Item#: 9SIAE9AKC77629

Meet Your Seller

Kingston 2GB 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop Memory Model KVR667D2S5/2G

Learn more about the Kingston Technology Corp. KVR667D2S5/2G

Customer Reviews of the Kingston Technology Corp. KVR667D2S5/2G

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