How thick is a computer RAM module?

Question

I was just using a DDR3 RAM module as a feeler gauge and it fit the gap perfectly.

However, then I tried to find out how thick it actually is and I couldn't find any specs.

I'm assuming it's standard 1.6mm FR-4, but there must be a specification out there, right?

Find a datasheet for the socket and you will probably find the answer. — Transistor, Jan 29 '19 at 21:39
Is mechanical design off-topic? There is a "mechanical" tag and there are questions like [this one](https://electronics.stackexchange.com/questions/353514/what-is-the-usable-area-for-connectors-of-a-pci-express-card-bracket). — AndreKR, Jan 29 '19 at 22:37

score 1 · Accepted Answer · edited Jan 29 '19 at 22:00

1

A simple google search gives you the answer you are looking for. the PCB is 1.27mm thick. For the other mechanical dimensions see here at page 11 DDR3 DIMM Dimensions.

Please note that not all manufacturers are equal, but in general these dimensions match the standard.

edited Jan 29 '19 at 22:00

AndreKR

2,999
3
22
28

answered Jan 29 '19 at 21:52

Elmesito

2,739
8
14

Nice find! I added a screenshot. – AndreKR Jan 29 '19 at 22:00

score -1 · Answer 2 · answered Jan 29 '19 at 21:50

-1

JEDEC says:

For DDR4 LP RDIMM reference designs with SDRAMs in a single row, a maximum package size of 11.0 mm nominal width and 13.0 mm nominal height will be used. Individual reference designs may have different requirement

answered Jan 29 '19 at 21:50

pjc50

46,540
4
64
126

That seems unrelated to the thickness of the PCB. – AndreKR Jan 29 '19 at 21:58
This seems to be talking about the individual SDRAM chip packages on the module. – Hearth Jan 29 '19 at 22:09

How thick is a computer RAM module?

2 Answers2