I feel silly because all the advice here was awesome and I tried them all.  Why is it I feel silly you ask? Long story short I bought this memory on eBay where it was advertised at 16GB (2x 8GB). I didn't even think of checking it until yesterday when I looked at the sticks and they clearly said" > 8GB (2X 4GB)   I've sent it back for a full refund as I think the seller also made a mistake. So basically there was no problem, the memory reported exactly what it was. I went ahead and found someone (who lives nearby) selling 4x 4GB and now have a full 16GB. Thanks for all the help!
Hey, I have an Optiplex 7010 which I am solely using with Proxmox for VMs. It came with 4GB memory and I have bought two 8GB sticks from Corsair (this is the specific model). I've installed and it told me it needed to check the memory as it had been changed. I said yes, and it run. OK, however, it only recognises each stick as having 4GB (i.e. half the size). Now I know this model supports up to 16GB, but even looking at the BIOS or my Proxmox install, it only shows as having 8Gb installed. I thought it could be an old BIOS so I upgraded it to the latest version but it didn't change the amount of memory it shows. I've read through a lot of other posts here where people report the same issues but nothing seems to work for me, so wondering if any of you can help? Thanks in advance
Optiplex 7010 only showing half the memory