CF-19 MK6, second/top ram slot non-functional

I recently purchased a 16GB DDR3L memory kit by Crucial, upon installing both sticks, my CF-19 booted fine, but I discovered it was only recognizing one stick (8GB) of memory.

I used the 4GB ram stick that came with my toughbook plus the known working 8GB stick and the bios recognizes 12 GB of RAM, I suspect it might be a bad ram stick.


Is there any setting I'm neglecting to change? Or maybe something else?

 

No settings. You have all necessary parts to check all combinations.

 

try one stick of the new memory at a time .
this will tell you if there is a bad stick .

 

Which windows are you using 7, 8.2 or 10

 

Win 7 64 bit.

I just got a replacement order in from amazon of the same 16 gb ram kit from crucial, same problem.

I just tested both sticks together; Booted fine, but only recognized 8gb, I tested each stick individually and both register 8gb in the bios.

So both sticks work; I know that both of my ram slots work as with the first ram kit, I used one 8gb stick and the existing 4gb stick that came with my toughbook, and the bios recognized 12gb.

Is there anyone that has a mk6 running 2x 8gb sticks of ram, and can confirm their bios/windows recognizes all 16gb?

 

confirmed

 

Do you have the manufacturer/specs of the ram you're running in it?

My personal preference from the good experiences I've had with it would be Kingston, I really wish I hadn't cheaped out and gone for Crucial over theirs.

 

Both Crucial and Kingston DDR3L work well in MK6.

 

Just discovered another issue with using the two 8GB Crucial DIMMs, the bios takes 2-3x longer to boot, and the menu navigation in the BIOS has a ridiculous amount of latency. probably a good 4-5 seconds between pressing one of the left or right arrow keys and the next page of settings being displayed.

I do not experience this at all with one of the DIMMs, or one 8GB + the Samsung 4GB that came with it.

 

Memory must be LOW density. High density won't work.

 

Low density 8GB stick )))

 

This is the RAM I purchased: https://www.amazon.com/gp/product/B007B5S52C/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

 

aha ... that rung the bell ...
i recall reading about the differences in HD and LD memory (insert technical crapola here ---> X ) .
one way to tell (and this is not always conclusive or indicative) is that LD is loaded with chips on one side and HD has both sides covered ,
of course , they can always populate a board on one side with HD chips or use LD chips on both sides .
"your mileage may vary , consult the manufacturers of the device for more exact information"

there is much information that slips through the cracks ...
many of us are familiar with "ECC" and "NON-ECC" (especially if you build comps from the ground up) .
we may not know exactly what it is or why it matters (loosing the magic smoke contained within ?) ...
but we paid attention to this detail , perhaps motivated (in part) by the cost difference between the two .

 

From DDR3 and up, I haven't seen a DIMM that has fewer than 8 chips on each side; Nor DIMMs that have chips on only one side.

The Samsung 4GB DIMM (which functions fine) that came with my toughbook has 16 chips total, 8 on each side.

The question is though, regarding the CF-19 in particular; Would high density cause the problems I've described, has anyone experienced problems like mine because they used the wrong density spec ram?

I can't really find much on incompatibility regarding memory density other than systems refusing to boot or post; My CF-19 does boot and does recognize one stick of the Crucial ram I have, it only fails to boot when BOTH 8GB DIMMs are installed, but even that isn't necessarily certain, it might be because I failed to install the battery cable that extends over the bottom ram slot correctly, as I had an issue with the battery not being recognized when inserted; checked the cable, noticed it was not sitting in the connector properly.

Either way my CF-19 does not seem to like this Crucial ram installed in pairs, they likely switched to high density memory as on their forums, their support staff says that most systems are not picky about which one is installed.

EDIT: I see that there is a bios update for my model of CF-19: BIOS update program V6.00L12 (Jul 22, 2014)

Should I try doing this before sending this second batch of Crucial ram back to Amazon?

 

"... their support staff says that most systems are not picky about which one is installed "
and the panasonic machines are in the category of "not like most other machines" .

as for the battery issue ... correct that and try again .
stranger things have been known to happen .
it is a case of eliminating possibilities .

usually a manufacturer lists different types/configurations of RAM that are known to work correctly .
i have found out (the hard way at times) that ignoring this information can lead to *problems* .
if one has the time and financial resources , one can "take a guess" and try *something* .
(yep , i have done this and there are points of failure)
the smart money is on what is known to work and/or the voice of *others* that have "been there , done that" .
the reasons of why something will not work can be found out after one gets around the problem and has a functioning machine .

 

Not sure if this will be of any use but this is what CPU-Z is reporting about my CF-19 with one of the 8GB sticks installed:

 

Got a response from Crucial on whether or not the ram I purchased is low density; It is.

Is this another bad batch?

 

most ram is marked 1R x ?? or 2R x ??.
Is yours marked? New ones and old ones
What are they marked?

 

Samsung 4GB is marked 2Rx8
Crucial has no such designation on it's label or packaging.

Kingston customer support also got back to me and said they no longer manufacture low density memory, neither does Corsair.

 

Even though i5 3320M supports up to 32GB ram, but Panasonic states in the manual max supported of cf19 mk6 is 8GB ram (motherboard factor).
In addition, you will never used up 100% of 8GB ram in cf19, so anything more than 8GB will not help at all.

 

640K ought to be enough for anybody...

My current RAM load (CF-19)

 

MS-DOS can't use above 640k anyway C:\DIR *.*

If I understand correctly, my CF52 with the dedicated graphics card has 512ram for the video. But this ram is included in the OS limit. So with a 32 bit system that is limited to 3.2gb. Subtract that 512mb and I am down to 2.7gb.

So if that is correct, a laptop with dedicated video card would be better with a 64bit OS and then max out the ram?

Probably true if you run a 32bit OS. However with a 64bit OS it could use 8gb if you open many windows or multi task. The general consensus is that 6-8gb is the sweet spot for the average user with Win7 64bit. Good performance for the lowest cost. Extreme users will want more than 8gb.

I am a 32bit kinda guy for the Windows environment.

 

mk6 supports 16gb... 8gb is if you want to put a camera in the second ram slot.

never mind, didn't see page 3 ... any way to delete posts on NBR?

 

Panasonic states max 8GB ram for a reason. Investing 16GB ram in order to run extreme programs or run super multi-task on cf19 is unusual b/c of 10.1", very low resolution (still low resolution when outputing to a monitor) and no option to upgrade graphic. My point is cf19 best function as 2-1 notebook, and it should be.

 

They just didn't have 8 and 16GB sodimms )
I'm fine with 16GB (2x8), it's under USD 100 total. But will not buy 2x16GB (I'm sure this config will work too) because of their price

 

hard to say if he did indeed say that (in)famous line .
https://imranontech.com/2007/02/20/did-bill-gates-say-the-640k-line/