Hey guys, just helped the g/f's mom get a new computer. It's a Dell 2400 (she's not gonna use it for anything besides internet, email, word processing and her Hoyle Casino games ) with a P4 2.8 (dunno if it's a northwood or prescott chip tho - i'll assume northwood since it's in their base desktop model). It only comes with 128mb of ram and Windows XP Home --> I'm shopping for prices right now, but I'm not sure about ram and HT; I also don't understand all the numbers such as PC2700, PC3200, PC3500, etc as well as "DDR". What type of ram do I need? (I want to put at least a total of 512mb of ram into the system so Windows XP won't bog it down.) Do I need the same size sticks (i.e.: two sticks of 256mb?) to enable/use hyperthreading? I know that you guys are real knowledgeable about ram, so please explain and bring me up to date.