Mixing PC100 and PC133 RAM

Hi all

I've just run a search on this and found nothing, so here goes.

I've just 'upgraded' from 256MB PC100 SDRAM (in 128/64/64 modules) to a stick of 256MB PC133 SDRAM. Now, I have noticed a slight improvement in performance, but I could be imagining it!

My question is, was the upgrade worthwhile in terms of pure speed alone, or would I be better off forsaking the speed increase and making use of the leftover 128 and 64MB PC100 sticks and pumping it up to 448MB for a better setup, and would it be 'safe' to do so?

I am running Windows 2000 Pro and perhaps could use the extra memory.

I guess it's a question of quantity vs quality really, but does the speed increase of PC133 justify not using the leftover RAM?

(It's a VIA KT133 chipset mobo BTW, w/an 1Ghz Athlon)

Look forward to hearing from you.

Cheers