freebsd-questions Digest, Vol 709, Issue 5

Dave B g8kbvdave at
Thu Jan 11 12:14:16 UTC 2018

That I suspect depends on how many physical address lines are available
for it via the memory management system.

If the PC documentation says 8G is the max', then that is probably all
that'll be seen by the CPU, even if there is 16G installed.

There is only one way to find out for sure, at your expense.

Personally, I doubt it, and the info at  says it wont.

If it does see 16G (or more) best park it in a corner and thrash it with
a Live Boot Memtest86 CD for some days, to ensure it's working
correctly.   (Let it run to full completion, it can take hours for a
full test, even for 4G!)

But even that, doesn’t fully exercise the memory management system in
the same way an OS will.

Chances are, if it works at all with the large memory modules, it'll
only "See" and be able to use 8G.

Have Fun.

Dave B.

On 11/01/18 12:00, freebsd-questions-request at wrote:
> Subject:
> OT: Max system physical memory
> From:
> Aryeh Friedman <aryeh.friedman at>
> Date:
> 10/01/18 14:59
> To:
> FreeBSD Mailing List <freebsd-questions at>
> My computer (HP Pavilion P7-1234, FreeBSD 11.1-RELEASE [amd64]) has 2 240
> pin DIMM (DDR3, PC3-10600) the manual says the max memory is 8 GB but I see
> some 16 GB packages (2x8GB).   If I put one or two of these in will it see
> the extra memory?

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