RAM Upgrade help

Can I hijack the thread a bit?
My laptop says:
1721983286954.png

I want to put in 2 x 16GB
Will CL16 vs CL22 be 1. compatible and 2. faster and 3.worth it at R350 more?
 
Matthysdt said:
Hi, I bought this module but turns out it's not ECC, so not compatible. No worries though, I should be able to return it.

View attachment 1745105

In reference back to my original question, when searching for compatible RAM, what criteria should I apply?

Looking at the label on my RAM (refer to OP) as well as other info provided:
  1. DDR4 - check
  2. SO-DIMM - unsure
  3. 2666V - check (but not sure what the "V" means)
  4. ECC - check
  5. PC4 - Unsure
  6. 1Rx8 - Unsure
  7. ED2-11 - Unsure
  8. HMA81GU7CJR8N - I'm guessing this is the product code, so ideally I should the same, but not required for compatibility. Right?
  9. VK TO AD - Unsure
  10. 2047 - As I understand this is the manufacturing date, so not required for compatibility.

So, from no 1- 4, I can shop for DDR4 2666V SO-DIMM ECC RAM. Will this be compatible or do I need to consider any of the other items I marked as unsure? I think one of those indicated ECC, but I missed it.

The spec from DELL states the following:
View attachment 1745107

Some replies above recommended SO-DIMM, some linked to modules that are RDIMM, the spec says UDIMM.
I'm beginning to feel pretty dimm.

How about this module? Will it work?
TakeAlot - Apacer - Apacer 8Gb DDR4 2666Mhz Desktop RAM (UDIMM)
Click to expand...

So-dimm is typically laptop memory, you want desktop memory. If you have ecc memory then you want unbuffered ecc ram otherwise known as u-dimm ecc (you also get u-dimm with no ecc, this is your commonly found normal everyday desktop ram). Do not buy r-dimm, known as registered memory, or lr-dimm, known as load-reduced memory, those won't work with what you have.

For your purposes you're looking for desktop ddr4 2666mhz u-dimm ecc, the brand shouldn't matter.
 
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