I have a memory issue with the configuration below (X8DAH+-F, 18 x 8 GB Hynix HMT31GR7BFR4C-H9).

- assembling and installing Windows Server 2K8R2
- checked memory >> only 120GB are shown in Windows!
- BIOS R 2.1
- IPMI 2.01
- Event log is o.k. !
- checked in BIOS – the same, 120GB instead of 144 GB memory is shown
- dismantled everything, checked processors, socket pins
- re-seating and checking memory one bank after the other > 144GB are shown, all fine!

- Tested all 144GB in Windows Burn-in-test > all fine

- Rebooted to Memtest ’86 v. 4.20 and got only 120GB !!
- Power off, power disconnect, power reconnect >> 240GB again!
- And no error logs at all…

Any idea?