I have two sticks of Micron ECC momory that do not work together. Both work alone. They are both ECC, 168 pin, 100MHz, 128MB sticks. Numbers on the labels are: Stick 1 - MT18LSDT1672AG-10EC7 Stick 2 - MT18LSDT1672G-10EC2 There are other numbers I can provide if needed. Stick 1 also reads COMPAQ and Stick 2 has the word SYNCH on it. I suspect that the COMPAQ may only work in a COMPAQ or that one is SYNCH memory and the other is A-SYNCH. Thought I'd ask here first before going to the Micron web site. Thanks, Tom The NOSPIN Group Promotions is now offering Mandrake Linux or Red Hat Linux CD sets along with the OpenOffice CD... at a great price!!! http://freepctech.com/goodies/promotions.shtml