RN524X RAM upgrade

Alright just wanted to report back again, the machine has been running great for a week with just the one good module installed, so all is good now, the memory was spec'd fine.  The important point there was that one of the modules was/is faulty and the boot menu memory test did not spot that after running 25 hours with both modules installed.  It did find come up more directly as a problem when running the boot menu memtest with just the one faulty module installed, the tester didn't spot it, but it crashed within 5 minutes after starting the test, two times in a row.  And with that module installed (or both), the machine would boot up and run for a while, for hours..then spotaneously crash at some point, usually under some kind of CPU load...forcing a raid resync everytime, which was concerning to be honest, hopefully the data was not compromised, but anyway...  seems to be sailing smooth now with just one 16gb module installed (see spec above).  The faulty one has been sent back to HK for a refund.  16gb is more then enough anyway, I didn't really need 32gb.

So what performance differences do I notice after a week running smooth?

1. a lot more caching memory is available and I notice that when I mount the raid from my mac over SMB, it is able to retrieve the folder contents list of certain folders with thousands of files, MUCH faster then before.  This must be because that information is getting cached more now.  However, i also notice that SMB process seems to run a little bit every once in a while to build that cache again when it needs to.  But before I often had to wait minutes to open a folder and wait to see the conents (7000 files).  Now it is often immediate.
2. Before I had to setup a cron job to start crashplan and midnight and stop it in the morning because it was using nearly all of the factory 4gb memory.  Now I can easily leave it running all day long and it barely causes the CPU to blink.
3. Before gitlab was pretty much unusable with only 4gb of memory.  Gitlab specs a need for 8gb+, and gitlab now runs perfectly fine and leaving it running all day, once it starts up, the CPU is having no problems.
4. I am able to have up and running at all times gitlab+postgres, docker, portainer, crashplan, wordpress+MySQL, qdirStat, sabnzbd, sickchill and plex.  No problems with memory, its using most of time only about 6gb of memory, and a nice large cache.

I do not think most people need to upgrade the memory on this box.  I did so mainly to run gitlab, and also because crashplan was pushing it to the limit.  What I can say is that if you have more advanced needs and are creatively using this box for stuff like I am, then its a pretty easy upgrade, once you locate the memory (not easy) and presuming the memory is not bad..which I might have just got unlucky that time.

Marking this thread as solved.