Pro Z790-A Max Wifi - Suddenly stopped reading second pair of DRAM

T

tech.rebate6115a802e8

New member
Joined
Nov 6, 2024
Messages
7
I have 2 pairs of T-Force 2x32 GB 5600 Mhz DDR5 (128 GB total) in the motherboard. Fired up the computer today and while it turned on, the screens received no input. Also, no power from the usb slots was going to the keyboard or mouse. I saw the Yellow light on the EZ Debug was staying on, so I shut the comp off, removed all of the dram and then reinserted to make sure they were seated right. Same issue.

So I tried removing two and leaving dram in slots DIMMA2 and DIMMB2 per the User Guide. Same issue.

I moved the dram to DIMMA1 and DIMMB1. Computer turns on correctly.

Shut it off and switch out the dram pair but use the same slots. Computer turns on. So both ram pairs work.

I then updated the Bios to the most recent for the board (7E07vM7 released 10/18). Once done, I check to see if it reset the dram speed. Sure enough, XMP was off and the speed set to 4800 Mhz. Computer runs fine.

Try installing the second set. Computer stops turning on.

Removed the second pair , leave one pair in A1 and B1 again and turn on XMP profile 1. Computer turns on fine.

I'm concluding something is wrong with slots A2 and B2.

What is causing this? Would a CMOS reset possibly fix this?

Kind regards,
64 Ain't Enough
 
Sort by date Sort by votes
Clear CMOS is always worth a try. However, updating the BIOS will have done that too. But yeah, try it, only takes a moment, less time than to ask here if it could help.

To be clear, this configuration worked fine before? How long did you have this much RAM, how long did it run problem-free for?
 
Upvote 0 Downvote
citay said:
Clear CMOS is always worth a try. However, updating the BIOS will have done that too. But yeah, try it, only takes a moment, less time than to ask here if it could help.

To be clear, this configuration worked fine before? How long did you have this much RAM, how long did it run problem-free for?
Click to expand...
I put the PC together in mid-June 2024. Been running fine since. It was fine when I fired the computer up on Monday (11/4). No indication why suddenly slots A2 and B2 stopped working.

So if updating the Bios didn't fix it, resetting CMOS shouldn't do anything either....so what else can I try? Is there a test on the ram slots I can do that I'm not aware of?

Are there any pc stats/configurations I need to post here that could help with diagnosing the issue? If so, let me know what is needed and I'll post it.
 
Upvote 0 Downvote
Yes, post all your hardware in detail, like the exact model name of the RAM kits, CPU, PSU... that is always a good idea, sometimes it can give a hint.

Then i would probably try re-mounting the CPU. While you're at it, check the CPU socket for bent pins, also see here and the following posts. Ideally take some photos of the socket, upload to an image hoster and link them here, even if you don't think there are bent pins (sometimes they are not that easy to spot for the untrained eye). Bent pins can a number of weird problems that are seemingly inexplicable, even delayed ones.
 
Upvote 0 Downvote
Motherboard: MSI PRO Z790-A MAX WIFI ATX LGA1700 Motherboard
CPU: Intel(R) Core(TM) i7-14700K 3.40 GHz (20 cores detected)
GPU: XFX Speedster SWFT 319 Radeon RX 6800 16 GB Video Card
DRAM: 2 sets of TEAMGROUP T-Force Delta RGB 64 GB (2 x 32 GB) DDR5-5600 CL36 Memory (CL36-36-36-76 1.3V)
** Checking the system, I'm wrong, only 1 of the dram is being detected, not two, as only 32 GB ram is detected. I'll have to test in a bit to see which other DIMM connector is not reading) **
PSU: SeaSonic FOCUS GX 1000 W 80+ Gold Certified Fully Modular ATX Power Supply
OS: Windows 11 Pro Version 23H2 Build 22631.4391
CPU Cooler: Thermalright Phantom Spirit EVO 69 CFM CPU Cooler

I'll do what you mentioned, take some pics and upload them.
 
Upvote 0 Downvote
I'm not seeing any bent pins
https://imgur.com/a/k032IUA
for full size images (4 photos)


IMG_1069.JPG
IMG_1072.JPG
 
Upvote 0 Downvote
Yes, pins all look good. BTW, the third photo on Imgur is the most useful one, since it has the tips of the pins in focus, they have to be in a perfect grid.

Can you test each slot individually with one module? And yes, do that Clear CMOS too.
 
Upvote 0 Downvote
So did the CMOS reset. Nothing, Same issue, can only read one Dram. Tested all slots. I had the slots initially reversed. Only the Dimm slot A2, the slot for using just one ram module, is working. All other slots won't read the ram but will feed it power for the rgb on them.

At this point I'm going to try Support. I should note this was a Amazon resell...so I'll probably have to replace the board.
 
Upvote 0 Downvote
tech.rebate6115a802e8 said:
I should note this was a Amazon resell...so I'll probably have to replace the board.
Click to expand...

Do you mean "Amazon Warehouse deals", so, a refurbished board? "Used", or "as new", "open box", "recertified", "Amazon Warehouse deals", it's all just code for: "The buyer returned it for some reason - We don't know what they didn't like, but why don't you give it a try for marginally less money than a brand new one!".

It's always a risk, and the reward in the form of savings isn't even that big most of the time. So i would not advise it, especially not for critical and complex components like the motherboard. Some problems you only discover later, and then everything is installed already. No good.

Now, as for the RAM slots, can you test each module individually in slot A2, just to see if the board works with all of them in that slot?
 
Upvote 0 Downvote
I tested each Dimm slot with each Dram module. All Dram modules work, but only in the A2 slot.

As for the motherboard, yes, it seems instead of saving 50% I'm going to have to pay 150%. Ah well, life's darn lessons.

Really appreciate your quick replies, Citay.
 
Upvote 0 Downvote
Back
Top