Hi,

this is my current decision, but I'm still missing some information, that I might get on Monday.

CPU
https://www.reichelt.de/PC-Components/CELERON-G1840/3/index.html?&ACTION=3&LA=2&ARTICLE=144661&GROUPID=6109&artnr=CELERON+G1840

I suspect for CRTs frequencies > 60Hz are still possible?

Mobo
https://www.reichelt.de/PC-Components/GA-B85M-D3H/3/index.html?&ACTION=3&LA=2&ARTICLE=134288&GROUPID=6127&artnr=GA-B85M-D3H

DualBIOS unfortunately has nothing to do with disabling UEFI/Secure boot.

"GIGABYTE UEFI DualBIOS™
GIGABYTE motherboards feature GIGABYTE DualBIOS™, an exclusive technology from GIGABYTE that protects arguably one of your PC's most crucial components, the BIOS. GIGABYTE DualBIOS™ means that your motherboard has both a 'Main BIOS' and a 'Backup BIOS', making users protected from BIOS failure due to virus attack, hardware malfunction, improper OC settings or power failure during the update process."

Linux compatibility isn't verified, I still have to do it.

This RAM
https://www.reichelt.de/DDR3-RAM/BLS4G3D1609DS1S0/3/index.html?&ACTION=3&LA=2&ARTICLE=119756&GROUPID=6609&artnr=BLS4G3D1609DS1S0
or this
https://www.reichelt.de/DDR3-RAM/KVR16N11S8-4/3/index.html?&ACTION=3&LA=2&ARTICLE=136426&GROUPID=6609&artnr=KVR16N11S8%2F4
or that one
https://www.reichelt.de/DDR3-RAM/KVR16N11S8H-4/3/index.html?&ACTION=3&LA=2&ARTICLE=136429&GROUPID=6609&artnr=KVR16N11S8H%2F4

Regards,
Ralf