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Issues with 128 GB DDR5 RAM Configuration?
Hi
I'm planning to build a new PC using a consumer-grade platform (likely an Intel Alder Lake or AMD Ryzen 7000 series) and I want to include 128 GB of DDR5 RAM. However, I've encountered issues with stability when using four 32 GB modules. The system seems unstable and the performance isn't what I expected.
Has anyone had success with a similar setup? Any recommendations for achieving stable performance with this amount of DDR5 memory? Any specific motherboard or RAM kits that worked well for you?
Thanks in advance
Thanked by 1stxsh
Comments
Hey!
Did you try to run a Memtest86?
Do you have this issue on multiple machines or just one?
Is ai written post ))
Haven't built a PC in decades. Using laptops these days. Though tempted with AMD Ryzen 9000 series.
But the usual applies
If you don't need 128GB memory, you can try 2x 48GB DDR5 DIMMs for 96GB
What motherboard and memory you using?
Can't tell if your looking for help or trolling with this post.
Give us CPU and mobo. If your using Ryzen, its really picky with ram. You might need to mess with timings and make sure the IF is set to 1800/3600. Don't decouple it, keep it with the ram speed.
I want more than 3600 🙈 AMD supports at least 5200 by docs.
I'm not trolling - I called several local companies after reading on Reddit about DDR5 RAM issues. I asked if they could sell me a custom PC that's fully tested, since sources suggest anything above 64GB DDR5 is unreliable. None could build and sell a custom, fully tested, 100% compatible config with 128GB or even 96GB DDR5.
I assume not everyone here uses only industrial CPUs like EPYC or Threadripper. Is there perhaps a bulletproof, tested combination of motherboard, CPU, and memory that can handle higher DDR5 capacities reliably? Or may be there are public resources with already tested configs including exact ram manufacturer/model?
Pretty sure that is with 2x single rank DIMMs at DDR5-5200. For 4x single rank or 2x dual rank DIMMs drops to DDR5-3600. Consult your motherboard manual or ask motherboard manufacturer.
You never mentioned the CPU and motherboard you're using and what memory modules?
It's also dependent on the Ryzen CPU's memory controller which can vary between CPUs and might need adjusting timings and voltages for populating 4x single rank or 2x dual rank DIMMs are >DDR5-3600
edit: curcial has a chart for AMD Ryzen 7000 series memory at https://www.crucial.com/articles/about-memory/everything-about-ddr5-ram
seems some Crucial memory with AMD EXPO support support dual and single rank 4x DIMM DDR5-5200
4x Sticks is a lot more of a struggle. Intel is more memory stable than Ryzen and what I posted was for DDR4 Ryzen chips (Zen 2 and higher). Zen 1 took a lot of time before the bios firmware made 3200 stable and with newer Zen 3600 was the non-overclock normals with 3733/3800 sometimes being impossible even with voltage increases. With Ryzen you also really don't want to decouple the IF as you will lose performance unless you manage to get really really high memory speeds (if even that). I've never been able to get 4x 3733 or 3800 to even post (With IF synced). 2x 3800 I did manage to get with some really good timings, but that's the silicon lottery.
I have no doubt the 7xxx and higher may have been improved, the more ram sticks (and maybe GBs) you put into your PC, the harder it is to get faster timings and speeds.
Thanks will check it!
I'm afraid to buy because I need a lot of memory for raw video editing and am thinking of switching to Apple.
I love Apple, but memory is very expensive on Apple, generally.
Go with 2x48gb. Way easier to hit high memory clocks and low timings with 2 sticks instead of 4.
https://www.newegg.com/kingston-96gb-ddr5-6400/p/N82E16820242824
https://www.newegg.com/kingston-96gb-ddr5-6000/p/N82E16820242826
Go to motherboard manufacturer's web site and pick motherboard model you plan to buy and then download QVL memory list and PDF manual to read supported memory etc
Unfortunately, there are many Reddit posts claiming that TVL is bullshit. I was hoping to buy TVL memory, but it doesn't seem to work.
Initially I was planning to buy at least 128 ))
You can probably run 4 sticks on AM5 without XMP/EXPO, so find some 4800 modules and you should be fine.
Or downclock your mem OC, or go Intel or Threadripper.
Then you have grounds to return the memory for a refund
Did you try it yourself? Or just going based on Reddit?
Then you have defective hardware. Did you order your parts from Aliexpress or similar??
RAM, motherboard (socket or trace), or CPU (memory controller). Likelyhood in the order I listed.
Looks like I have a good reason to get the MacBook Pro. It's just $1,000 more and has better specs.
🦄
Thanks for all replies!
This is best practice and read the specs on the supported memory configurations.
Macbook Pro is not a comparable use case for a Ryzen desktop with 128 GB DDR5... Seem's you need to decide what the use case is and go with that. Good luck!
Absolutely 💯
https://asrock.com/mb/AMD/B650E Taichi Lite/Specification.asp#Specification
https://www.amd.com/en/products/processors/desktops/ryzen/7000-series/amd-ryzen-9-7950x3d.html
But 192 GB of RAM works well in many setups. However, using 4 DDR5 RAM sticks at the same time can cause stability issues. There are no official guidelines for this, so I asked if anyone has tried it on AM5 servers.
And the Apple MacBook Pro especially Max is better than most desktop computers when using DaVinci Resolve, but costs "a bit more" )) That is why I was trying to save "a bit".
Intel Arrow Lake will be released next month.
AM5 with 4x DIMMs = high chance of issues above 4800MHz.
With Arrow Lake you can easily get 6000-6400MHZ working, possibly more with tweaking.
Do not even think about buying Alder Lake now, Arrow Lake will completely spank it and it will be on new socket that will get 2+ new generations of CPUs, one in 2026 will be groundup redesign of performance cores.