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The complete list is here: DDR4 SDRAM R[^] - pinouts start on page 5.
You'll notice that there are a lot of VSS and VDD pins: these can be thought of as power and ground respectively, and there are probably a lot of 'em because the traces leading to them are so thin and the voltages so low - but that's just a guess.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I would speculate, the remaing pins are 'ground' to seperate noise.
But only speculation 
[Edit]
Or more likely differentially signal lines
[Edit01] ChatGPT, take care..
Yes, this is indeed related to differential signals. In DDR4 memory modules, many signals are transmitted as differential signals. This means that the information is not transmitted as single voltages (as with unidirectional signals), but rather as the difference between two voltages.
Differential signal transmission offers several advantages, including better noise rejection and higher immunity to electromagnetic interference (EMI). This type of signal transmission is particularly important at high data transfer rates, as is the case with DDR4 memory modules.
Therefore, many of the additional pins on a DDR4 DIMM module are reserved for differential signal pairs to ensure reliable and fast data transmission. The ground lines we mentioned earlier also play an important role in providing a stable reference for these differential signals.
modified 4-Oct-23 16:14pm.
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JEDEC is something like "Joint Electron Devices Engineering Council", a very old industry standards body.
JEDEC - Wikipedia[^]
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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no driver updates for Artesia M200 ... using VLC equalizer working. but sound murky.
better player than VLC ? possible interaction with Logitech g431 software ?
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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I'm not sure what you're asking for exactly.
But, I did have problems with "murky sound" a good while ago, when I had my old SoundBlaster X-Fi (USB) hooked up in such a way that it went through a USB2 connection rather than USB3.
Changing connections so I knew (for sure) it was going through USB3 fixed the problem. Which makes very little sense, since the device itself predates USB3. I rather strongly suspect this is because it went through a long chain of hub going through hub going through hub, and USB2 perhaps couldn't carry the amount of data from all devices that were all competing for bandwidth.
In other words: Try hooking up your G431 headset so it goes through a shorter USB3 path...?
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The comment below that article is better
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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Maybe a year ago I tried to compile my graphics library for MSVC and got a zillion errors in my template declarations. Or at least that's what I remember.
I couldn't figure out why, and even ranted here about MSVC not following the standards, but was corrected on that - apparently they do but the way they interpret them is/was maddening.
I figured it wasn't a huge deal since the library is IoT/embedded and that toolchain is GCC or Clang 95% of the time, or at the very least satisfying the 80% rule in terms of usage scenarios.
Today because it was 3am and I was for want of something better to do, I decided to try my hand at making my large library MSVC compliant.
Fired up a project, CMake, made a fetch_deps bat to pull in my dependencies and I got a few errors, and a handful of warnings.
The errors I fixed in several minutes and had nothing to do with my templates unlike before. This is a far cry from what I ran into last time.
Now it works, and I don't want to ask too many questions. I think maybe they fixed some things in the latest compiler, or if not fixed, at least more sanely interpreted the C++ spec.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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That's right, that's right. Take your "good morning" and flaunt it at the rest of us, slowly sinking beneath the swamp of oozing gray existential ichor...
(I've had a crappy week and felt compelled to share)
Software Zen: delete this;
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I hope it gets better!
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Pretty is not poetry... confused? So sue me! (9)
Happiness will never come to those who fail to appreciate what they already have. -Anon
And those who were seen dancing were thought to be insane by those who could not hear the music. -Frederick Nietzsche
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Nice!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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First one I've solved in ages ...
PROSECUTE
Pretty --> CUTE
not poetry --> PROSE
confused = switch order
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Very good  YAUT!
Happiness will never come to those who fail to appreciate what they already have. -Anon
And those who were seen dancing were thought to be insane by those who could not hear the music. -Frederick Nietzsche
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It was a clever clue, and the first time I looked at it I was totally blank.
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Thank you! 
Happiness will never come to those who fail to appreciate what they already have. -Anon
And those who were seen dancing were thought to be insane by those who could not hear the music. -Frederick Nietzsche
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So was I
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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I liked it!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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It was a good clue
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Stride is nice... I've tried it, but it doesn't work properly with my VR headset.
In fact despite it's claims, the only one I've seen it play with correctly is the oculus, it seems to have mega problems with Windows Mixed Reality.
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Oh Stride... it had a promising start, being an off shoot of abandoned but well developed project, but development is going at a sub glacial pace... 
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OHHHHHHHH I have SOOOOOOOOO been wanting this, after all the fall out recently with Unity....
I know what I'll be doing this weekend.
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