Adding old memory?

[Dan J]

Hi just a quick question...

Is it a good or bad idea to use free memory slots with old memory?

For example if 2 slots have 4gb memory (8gb total) then is it worth putting 2 x 1gb memory in the other slots? Will this ultimately improve mem performance or decrease it?

Ta

 

[Dan J]

Hmmm yeh I wondered as my initial thought was more memory = better but then thought you don't want the computer utilizing 'less good' memory...?