Hello everyone My friend has a p3 machine with SD RAM and he wants to upgrade his RAM. Currently he is using hyundai 64 MB PC 100 RAM. The question is whether or not a RAM of any other brand work in his computer. If it does not run then is it also the case with DDR RAM ? . I mean can we use RAM of two different brands. Finally which is the best brand of RAM. I use Corsair and i think it is great. What about Kingston and Hynix?