Linux not seeing Ram. But Windows does ?

[area51_for_psx]

Guys am building a wee home server out of random parts. And was looking to try Linux as I am not confident with it.

Xeon E5-2650 v4
Board is Machinist X99 PR9-H (from A Express)
128GB 4*32GB (Matching sticks)

So everything looks ok in bios and all ram is seen. When I installed Ubuntu it only showed 64GB installed. Same on debian when I tried

When I installed windows server straight away it picked up the correct amount of Ram. 128GB

Anyone any ideas?

Regards

 

[area51_for_psx]

Yeah they are ECC modules. Ill install Ubuntu again and run the commands

 

[area51_for_psx]

Im going to run memtest86 overnight and see what the morning brings

 

[area51_for_psx]

So memtest ran for 8 hours and all passed.

I tried ubuntu server this morning and it sees all the ram. (I was looking normal ubuntu since it has a gui) but I might have to stick with ubuntu server.

The ubuntu image i was using was ubuntu 24.04.03 desktop - amd 64

So yep im confused lol

 

[area51_for_psx]

uname -m will confirm the architecture.

uname -m returns x64_64

So yeah 64bit.

 

[area51_for_psx]

Further update.,.

So ubuntu server sees 128GB and Mint sees 128GB but desktop ubuntu doesn't.

 

[area51_for_psx]

Yeah installed ubuntu server. Just getting to grips with it. Thanks for all the input guys