RAM sticks not recognized
Solved
baladur13 Posted messages 47329 Registration date Status Moderator Last intervention -
Hello,
Here I am explaining my concern,
I have 2 DDR4 memory sticks of 16 GB (2x8 GB), which makes a total of 32 GB + another stick of 8 GB, totaling 40 GB of RAM.
I needed to format my PC, and when I check the system on the PC, it shows me that there are only 24 GB of RAM.
First question, why am I not seeing the full 40 GB?
Second question: is it possible to have the 40 GB of RAM installed? And how can I do that?
Third question: is there any risk to the machine?
To clarify, I am not an expert in computers, but I manage, so if you could help me with clear explanations lol
Thank you in advance for your help.
10 answers
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flo88 Posted messages 28487 Registration date Status Contributor Last intervention Ambassadeur 5 169
Hello
1
I have 2 DDR4 memory sticks of 16 GB (2x8 GB), which makes 32 GB.
You understand that mathematically there's an issue; I understand that you have 2 x 8GB... 16GB total, not 32. So 16 + 8, 24GB makes sense.
2
See 1
3
No risk.
Signature
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thank you flo88 for your feedback, and no I do have 2 sticks of 16 GB each + 1 of 8 GB
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Hello funragon
About the photo of the RAM bar
CMU 16GX4M2A2666C16R
DDR4 16GB(2x8GB) 2666Mhz
I am like the system (2x8) you need 2 identical sticks plugged into 2 slots to make 16 GB. It should simply be a single kit of 2 matched sticks tested and guaranteed from the start, unless there is a failure or aging for frequencies at given voltages all together but alone (hence a single reference of 16GB but marked on both), and probably in dual channel each in a channel.
Mixed with a 3rd stick of 8GB, we would end up in 3x8 = 24GB but in single channel, we just need to test on a PC if all 3 are used, and which frequencies work well without bugs or errors with memtest for example or a program that retries the calculation and starts over if there are errors (folding@home to even test large systems 24/7), and as flo88 said, after that it runs in 24GB single channel, you tested so you have the frequency without bugs on this PC, no risk for you.
After seeing so much I understand what the system says but I don't understand what you say, I put +1 on flo88's post.
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PS: my PC, even though it’s crappy, is doing folding @ home right now, it is doing medical research by itself, soon or in a long time it has worked on flu strains (all including avian for the vaccine) genomes of everything and anything, mathematical research, research on parallel computing in computers, COVID to go very fast for all those who needed it, cancers, Parkinson's, Alzheimer's... It's reliable to test a PC Saturn5 or another, but please finish your WUs (work units) very quickly to be useful, even if you do only one. Thank you.
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Hello,
What are the references (brand and model) of your PC or your motherboard?
Very difficult to catch a black cat in a dark room.
Especially when it's not there... -
Thank you baladur13, and here is what you requested.
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Ok.
The Asus Prime X370-Pro motherboard can handle 64 GB of RAM and has 4 "banks."
The issue seems to be that normally the RAM sticks must be arranged (in the correct "banks") and installed in pairs in order to work in "dual channel."
Excerpt from the motherboard manual page 1-5:
flo88 Posted messages 28487 Registration date Status Contributor Last intervention Ambassadeur 5 169
Hello
Regarding the 16 GB of the stick in your photo, it’s a stick from a kit of two. 2x8, so 16 GB. The naming on the kits is always misleading, that’s how it is, they are sold in pairs. You don’t have 2x 16 GB but rather 2x8 as noted on the stick.
As Paul also mentioned.
With CPU-Z, in the memory tab, you can see the total amount of RAM installed that is listed.
Signature
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Hello,
For me, a 16GB (2x8GB) module refers to a 16GB module that has two "ranks" of 8GB, thus being used in "dual channel".
In other words, this type of module should be placed on A1 B1 or A2 B2.
Hello
If we set aside the placement of the RAM sticks, which mainly affects dual channel or not, which is like having tinted windows on your car or not (bad example, I don't have a better one)
It's a kit, with two 8 GB each, 16 GB in total. It's not a single 16 GB stick, that's for sure.
VENGEANCE® LED 16GB (2 x 8GB) DDR4 DRAM 2666MHz C16 Memory Kit - Blue LED (corsair.com)
Kits are always marketed this way, it's misleading, bordering on dishonest, but it's been like this for a long time, it always leads to endless discussions.
OK... I always thought that the inscription on the stick was for this stick and not for a kit of 2...
A CPUZ on each installed stick should clear up the doubt...
I think I didn't express myself clearly, or maybe I just don't understand anything lol
I have a total of 3 sticks
one stick has 8 GB, no problem
on the other 2 sticks, it says 16 GB each, which makes a total of 32 GB.
So 32 and 8 make 40 GB
so why does my PC only detect 24 GB?
I am getting back to you to confirm that I indeed have 40GB of RAM.
I posted the same message on another forum, and I wrote exactly the same things as here, and all the participants in the thread confirm that I have 40GB.
The issue seems to be that there is certainly a faulty stick, or I might need to reseat them.
I will return here to update you further.
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Oh well, you declare the 2 memory sticks defective and that it's indeed 2 times 16 GB, no worries, you send them back under warranty in the first few days after purchase and they will refund you, making it a nice proof that you're right.
And I bet you can get the refund without any problem for an online purchase, you can make 3 different purchases and get refunded for all 3.
They told you why it's better to put the 2 identical sticks in a1b1 or a2b2 if you're in dual channel.
And we can even find you a motherboard where you can put 4 sticks in 4 slots and it will still give you 32 GB even if on another board the 4 sticks are recognized for 64 GB. And neither the motherboard nor the sticks are defective.
It's already written on the forum.
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I posted the same message on another forum, and I put exactly the same things as here, and all the participants in the message confirm that I have 40GB.
That's definitely proof that it's deceitful, but did you post the CPU-Z screenshots on the other forum? With the precise characteristics of the 3 sticks? Their manufacturing date? The brand of the RAM chips?
Surely not, otherwise you would have received the same response as here: 3 sticks of 8GB. No more, no less.
I think I’m not wrong in saying that you didn’t assemble this PC, so pull out your invoices where the hardware is listed, and you’ll see how much RAM it was sold to you with.
After all, everyone has their own job.
I’m closing my comments with this message, there’s no need to insist any further.
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There, you were told the same thing
https://forum.clubic.com/t/probleme-barrette-ram/482082/10
excerpt
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