Order in which additional rams are installed

[TlatsiMm]

Good day 

• I would like to know if it matters which ram is installed in which slot if they don't have the same capacity.
• I have an 8gb and two 4gb rams on a hp Elitedesk 800g1. I'd just like to know if there's any specific configuration instructions to follow when installing i.e (in ascending or descending order according capacity or not)

[Prométhée]

hi

• HP EliteDesk 800 G1 Small Form Factor PC
• HP EliteDesk 800 G1 Ultra-slim PC
• HP EliteDesk 800 G1 Desktop Mini PC
• HP EliteDesk 800 G1 Tower PC

may depend on the model

 Hardware Reference Guide

 HP EliteDesk 800 G1 Tower HP EliteDesk 800 G1 Small Form Factor HP EliteDesk 800 G1 Ultra-Slim Desk...

if you have dual channel or more
you usually have colors, as mentioned in the document
it is therefore necessary to have exactly the same modules speed, capacity size etc, in each slot which corresponds
If you use different modules, one it may not work
then you lose the dual channel, and the speed will be lowered to the lowest, see here:

upgrade computer h9-1228ef mot...

so if you have two different models, it does not change much for the location it seems to me