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For people who have had issues with using 4 sticks of DDR5 RAM simultaneously, I might have found a solution.

Hey everyone.

I had a client who bought 4x16GB RAM for his PC (I suggested 2x32GB be he ended up with 4x16GB because he got a good deal on it, unknowningly of this issue), and had pretty major issues. I have seemingly fixed it for the time being without any major drawbacks, and thought I'd share my experience and method with you guys.

JayzTwoCents on YouTube also seemed to have this issue (https://www.youtube.com/watch?v=uu9U7TVNImI), but seemingly thought the motherboard was just bad.

After some tinkering, I might have found a temporary solution that seems to work pretty well untill the "4x DDR5" thing gets resolved in the future.

So here was the issue described by the client (Specs: 7950X3D, Asus ROG X670E-F Gaming Wifi, Asus ROG RTX 4090, 4x16GB DDR5 6000/C30, MSI A1000G PCIe5) :


> Whenever I restart/power off or power on my PC, it gets stuck trying to power off for about 10 seconds with the DRAM QLED glowing orange. Same issue when it tries to power on as well. The motherboard seems to resolve it and then boot up. Clearly though, something is off with that. I’ve tried reseating the Ram without success. I was extremely careful when installing the cpu as well. Any advice? I am going to try reinstalling BIOS and changing XMP profile tomorrow. I’m hoping it’s not something along the lines of the RAM being incompatible with the motherboard. I’m checking that tomorrow too. Any advice or ideas would be appreciated as I’m worried this issue will escalate.
>
> I reinstalled the BIOS and changed all settings to default. Then, it booted perfectly fine where each debug light would come on for about 1 second and then boot at a normal pace. I then went and changed each setting I had altered in the BIOS 1 by 1 with restarts in between, and I found that it was the EXPO (XMP) profile enabling that caused the 6-10 second pause on the orange light every single power off / power on / restart. This is really strange, and I am not sure if this is an issue I should try to work around or if there is an issue at all. It just seems unnatural for my PC to idle on that orange DRAM light for so long every single time where it makes me think the motherboard doesn't like the expo profile or something.

# Here's the fix that eventually resolved the issue, with a few minor caveats:

It's pretty well known at this point that 4 DIMMS of DDR5 has issues with running EXPO (and also XMP is less cases with Intel), but we eventually got it running at full speed with all 4 DIMMS:

Through a few hours of research, I found that there is actually a second Memory Context Restore option in that needs to be enabled in the BIOS under AI Tweaker>Advanced/AMD CBS/DDR Options/DDR Memory Features (this might of course drastically differ between motherboards!). After enabling that second profile, he no longer had the issue. I think, since it doesn't automatically enable with expo, the motherboard was having to load the RAM Expo profile / frequency change each time which took the 6-10 seconds. It seems that even at a 6000MT/s speed of DDR5 (which isn't even **that** high), the motherboard just needs a longer amount of time to train the RAM each boot unless you turn on both **Memory Context** AND **Power Down Mode** to ***Enabled*** in the BIOS. ***Seems like major instability is caused by having that second memory context profile set to auto rather than set to on***. Same with the power down mode. Has to be enabled or the PC would constantly crashes. So far, with 64GB installed at least, we have not encountered any noticeable performance decreases or stutters, and seems to work perfectly fine.

I hope this might in the future at least help 1 person in need of a solution. Because alternatively we had to get a different motherboard or return the RAM instead. That being said, if you're still in the market for DDR5, just go for 2x16 or 2x32GB for now to be safe.
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