TechnicalX99 motherboard not showing all RAM

 

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 From:  milko   
 To:  milko      
42548.5 In reply to 42548.4 
oh, where the BIOS *does* see them is in "ASUS SPD Information" whatever that is. 

In slots A1, B1, C1 and D1 I have an Avexir 8GB DIMM. however it's only in A1 and B1 that it seems to pull all the details up correctly, C1 and D1 don't fill all the information. But A2/B2/C2/D2 which are empty come back with completely empty pages, so it's not like it doesn't know something's there.
milko
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 From:  Matt  
 To:  milko      
42548.6 In reply to 42548.4 
Looks like the X99 didn't have a memory remap option. My bad.

I would check you have the DIMMs installed in the correct sockets. ASUS uses (IMO) a really unintuitive naming convention for their memory sockets in the schema A1, B1, etc. which can be confusing.

As you have 4 DIMMS they should all be installed in A1, B1, C1 and D1 and not A1, A2, B1, B2 as you might think.

doohicky

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 From:  Matt  
 To:  milko      
42548.7 In reply to 42548.5 
Have you tried switching them around incase the DIMMs are bad?

doohicky

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 From:  CHYRON (DSMITHHFX)  
 To:  Matt     
42548.8 In reply to 42548.6 
He did install A1-B1-C1-D1, I suspect he needs to to try A1-A2, B1-B2.

Edit. Ah nope, A1-B1-C1-D1 is recommended per x99 manual... maybe check all dimms are the correct spec and matched? Did they come with the bundle and supposedly working with it?

From the ASUS support faq:

Memory isn't detected

6. Please clear CMOS first and check if memory is detected
“Finally, my home state is known for something besides racism and old people!”
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 From:  CHYRON (DSMITHHFX)  
 To:  milko      
42548.9 In reply to 42548.1 
https://forums.tomshardware.com/threads/ram-not-fully-detected.2004456/

A lot of similar complaints here... the only practical suggestion is the last one: check the cpu for bent pins:
 
Quote: 
I had a similar problem when I reseated my i7-5930K. A bit of plastic debris hit one of my pins, so the RAM on DIMM_C1/D1 was not fully registering in the BIOS. My BIOS would only detect 8GB or 16, and the sticks would show up in BIOS reading "(Blank) GB, (Blank) Hz". Windows only recognized 8GB, but CPUID would show 16GB as being plugged in.

Switching the sticks did nothing. as the sticks were all perfectly fine, it was a bad pin (or pins) that weren't reading DIMM_C1/D1.

I recommend reseating your CPU and checking for any lint/dirt/debris or bent pins.
“Finally, my home state is known for something besides racism and old people!”
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 From:  milko   
 To:  ALL
42548.10 
Everything came ready-seated apart from the cooler, I had a lot of long-story fun and games with that too. I trust the seller and that it was working for him.

Tried a few different BIOS settings today, nothing major. Nothing changed anything, so I put 'em back. Then I remembered this switch on the board which enables the TPU - I'd turned that off during earlier woes but the original owner had it enabled originally. Anyway, since it effects overclocking I figured why not try and enable it, the temps are all nice and low it might even solve the RAM thing. 

It wouldn't even get to BIOS. Erk! I set it to the middle setting, and again no good. I turned it back off, and I still can't get the fucker to boot. Fucking hell, computers. Resetting the CMOS via the switch didn't help either, it would get part way through the boot and then seem to hang, but not always in the same place or with the same Q-code. So I pulled the battery for half an hour and then fired it back up.

It got to BIOS. More weirdly still, it shows 32GB RAM!

I enabled the XMP setting again since the reset had turned that off. It still shows 32GB RAM! And in Windows!

I think that probably means DSMITH is the prize winner, it's just a shame I solved it myself before I read that :)

I did try all that reseating the CPU stuff yesterday having read the same forum posts, it didn't help me.
milko
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 From:  graphitone  
 To:  milko      
42548.11 In reply to 42548.10 
Is it still stable, after reboots and a total power off?
Might be worth looking around for an updated firmware for the board. There was one site that I found really useful when sticking a custom firmware onto my ageing board which I needed to get a recent GPU upgrade working. I'll post the link if I can find the site again.
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 From:  milko   
 To:  graphitone     
42548.12 In reply to 42548.11 
seems fine now. Firmware was all up to date. I guess it just really really needed the CMOS battery reset for some obscure computers reason. Next thing to try is overclocking a lot!
milko
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