My desktop (Dell Inspiron) has only a measly 4Gb RAM which is choking it. I could add another 4 Gb but I was wondering if I could add 8 bringing it up to 12GB. But I seem to recall that at one time you had to have two matching size memory sticks, is that still the same?
Much will depend on the particular PC/motherboard.
The requirement/recommendation for matching memory banks is generally to do with performance where the motherboard can run in dual-channel mode (and will only do so with matched memory, preferably in both capacity and other characteristics).
Many motherboards will cope with non-matched banks, albeit taking a performance hit over and above those that are matched, since dual-channel working will be inhibited.
Post the make/model of your Dell and I'm sure someone will be able to point you at recommendations.
I don't think so but two matching work faster IIRC. Have you got the manual for the motherboard, that might tell you the best configuration. Mine takes 4 sticks max and I am sure they don't all match, I think one pair do but the other two slots just have a couple of sticks I took from other machines.
4Gb isn't much these days and probably would give problems with Windows 10 but you could also spend a few minutes to try to identify anything which might be taking up lots of memory, using Task Manager and Resource Monitor.
EDIT: I had nearly finished typing this then got a call so T&E beat me to it, but we seem to broadly agree.
>> Knowing you as I do, and assuming you are a bit of a cheapskate, I'll
>> bet you went for the Intel Celeron model. In which case sticking 12gb of memory
>> on it is a bit like putting lipstick on a pig.
It's a Pentium, so there.
I think I'll go for either another 4GB from Dell or a single 8GB from Crucial, can't be 'Arrised messing about.