*EDIT* Making some progress. If I change the RAM frequency to be 2000Mhz all of the RAM is recognised. Would like to see if I can get it all recognized at the right frequency though. *EDIT*
Got a weird issue. I have an unRaid server which had 16GB RAM and wanted to upgrade to 32GB. I bought some new (used) sticks on eBay which match what I already have.
For reference this is the hardware:
Mobo: ASUS X99-WS/IPMI
CPU: i7-5820K
RAM: HyperX Fury 2400Mhz DDR4 (8GB DIMMs x 4)
I have checked the manual and I am confident I have installed the DIMMS in the right slots (there is 8 in total I am using A1, B1, C1, D1.
When I first installed everything the BIOS was only seeing 16GB. I swapped the RAM in the slots (so the old ones were swapped with the new ones). It was still only seeing 16GB.
I updated the BIOS to the latest version, still only seeing 16GB.
Tried fiddling with lots of BIOS settings, still only seeing 16GB.
Removed some of my PCI-E devices, still only seeing 16GB.
Finally I tried removing the CMOS Battery. After the machine rebooted it could see 32GB. However whenever I reboot the machine after that (without changing any settings) it goes back to 16GB again! Agh!
Interestingly on the boot after a CMOS clear XMP settings aren't available in the BIOS. After I reboot they are available. I've tried setting everything the same between the first CMOS boot and subsequent reboots and haven't had any luck.
Tried sending some more voltage to the RAM (1.35, 1.4, 1.5) doesn't seem to help.
There is a 'tool' in the ASUS Bios called ASUS SPD Information. It can see that there is something in the slots I have the DIMM installed however, on two of them it doesn't have any 'Module Size' or 'Maximum Bandwidth' information.
Any ideas why it might not be working?
Here are some photos of the BIOS post booting after clearing CMOS:
https://imgur.com/gallery/uGCrudB
Got a weird issue. I have an unRaid server which had 16GB RAM and wanted to upgrade to 32GB. I bought some new (used) sticks on eBay which match what I already have.
For reference this is the hardware:
Mobo: ASUS X99-WS/IPMI
CPU: i7-5820K
RAM: HyperX Fury 2400Mhz DDR4 (8GB DIMMs x 4)
I have checked the manual and I am confident I have installed the DIMMS in the right slots (there is 8 in total I am using A1, B1, C1, D1.
When I first installed everything the BIOS was only seeing 16GB. I swapped the RAM in the slots (so the old ones were swapped with the new ones). It was still only seeing 16GB.
I updated the BIOS to the latest version, still only seeing 16GB.
Tried fiddling with lots of BIOS settings, still only seeing 16GB.
Removed some of my PCI-E devices, still only seeing 16GB.
Finally I tried removing the CMOS Battery. After the machine rebooted it could see 32GB. However whenever I reboot the machine after that (without changing any settings) it goes back to 16GB again! Agh!
Interestingly on the boot after a CMOS clear XMP settings aren't available in the BIOS. After I reboot they are available. I've tried setting everything the same between the first CMOS boot and subsequent reboots and haven't had any luck.
Tried sending some more voltage to the RAM (1.35, 1.4, 1.5) doesn't seem to help.
There is a 'tool' in the ASUS Bios called ASUS SPD Information. It can see that there is something in the slots I have the DIMM installed however, on two of them it doesn't have any 'Module Size' or 'Maximum Bandwidth' information.
Any ideas why it might not be working?
Here are some photos of the BIOS post booting after clearing CMOS:
https://imgur.com/gallery/uGCrudB
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