Hi Jo Ann, Both of those modules are identical, except for their rated speed. The 70ns 30pin SIMM is the more desirable of the two. You should understand that if any of the modules already in the mainboard is rated slower than 70ns., the entire collection of modules will run at that slower speed. Conversely, if the modules already in the board are rated faster, the whole system will still run at the 70ns. that these modules bring to the mix. My suggestion, if you can afford it, would be to buy 8 of these modules to guarantee that all of them will be running at their rated speed (and to have them all under a single warrantee). Peace, G Man PCTechTalk Owner ----- Original Message ----- From: "Jo Ann Weaver" <hillfarm3@xxxxxxxxxxxx> To: <pctechtalk@xxxxxxxxxxxxx> Sent: Sunday, October 27, 2002 10:11 PM Subject: -=PCTechTalk=- Re: old computer memory question G Man, Just go to the sites main page, click on the memory category, then on 30 PIN look at the last two which are the only 4 MB sticks there. Thanks, Jo Ann To unsub or change your email settings: //www.freelists.org/webpage/pctechtalk To access our Archives: http://groups.yahoo.com/group/PCTechTalk/messages/ //www.freelists.org/archives/pctechtalk/