Bios shows all 8gb RAM, Debian only sees 4gb?

Hardware
21

This is a DDR2 System?

Are you using a 32bit or 64 bit OS?

nvm

1 Like
22

welp, it must be something with the motherboard. still shows 8gb in bios but booting into any live environment only shows 4gb. PureOS has a hardware detection tool and when I look at the ram it locks the system. last step is to reseat the cpu but I don’t have high hopes. anyone have a dual socket xeon they’d like to donate lol.

1 Like
23

Could be worth trying.
Did you also try to swap modules from one slot to another?
And are those modules all the same? or a mix match?
Seems like it’s dropping a channel.

1 Like
24

I have 4 matched modules and 2 same but unmatched. I’ve tried every configuration. Linux and my motherboard are not communicating.

If I didn’t mention it, this motherboard and ram has ran flawlessly for years together.

25

Reseated CPU and even swapped to a different CPU, no dice. I’m completely dumbfounded. Aside from the pure OS hardware detector locking, I don’t even see a clue as to what’s going on.

26

AAAAAAAAAAAAAAAAAAAAAAAAAAAANNNNNNNNNNNNNNNNNNNNNNNDDDDDDDDDDDDDDDDD

She donzo Steve

Booted to gparted live, started memtest86, it only showed 4gb but I switched monitors and let her run. noticed about an hour later it was off. hit the power button nada, tried a few quick resuscitation techniques, no go.

27

That fixed it :joy:

1 Like
28

Have you tried two modules ONLY

  • 2 modules in the channel A slots (other channel empty) - test that works
  • 2 channels in the channel B slots (other channel empty) - test that works

I.e., test 2 sticks only work in both channels.

That will at least confirm whether or not it is a physical channel problem (e.g., pins on cpu socket, motherboard traces, or whatever), or a number of DIMMs problem.

29

Unfortunately, all of that has been tried. She just gave up the ghost… or my power supply died on top of the memory issue, but it’s a fairly new unit from EVGA so I highly doubt that. All will be checked in time.

30

Matx installed, works… max mem is 4gb in this one though and it’s 1 to few pcie slots, but It’ll work for now.

1 Like
31

This topic was automatically closed 273 days after the last reply. New replies are no longer allowed.