Because of the way the economy is atm, I've decided to inject my dinosaur PC (Pentium 4 2.6gHz, uses DDR2 RAM, has an AGP graphics card which has died - good job there's ebay!) with a bit more RAM and limp along until I can afford a newer system, which I've sworn I'm going to save up for... my Christmas present to myself.

My question is:
This MB has 3 DIMM slots that can handle anywhere from 64 mB to 1 gig. I've bought two 1gig DDR2 sticks and have replaced the two 500mB sticks. Is it smart or even safe to use one of the 500mB DIMMs I pulled out or can you not mix and match denominations like that? The motherboard manual I downloaded for this MSI board was - I'm fairly certain - written by someone who, in every-day life, does not speak English... in any event, no mention is made whether that can be done or not.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks