My machine takes: PC2700 DDR 166MHz it has 2 slots and can has a maximum capacity of 4096 MBytes. Is there a compatibility DDR that I can use, so that I can get 2 x 2GB sticks to run in it? Let me know! thanks.

Go to crucial.com and use their on line scan to determine what RAM is compatible with your computer.

2GB sticks of DDR are expensive. Most, if not all, is EEC RAM which is used in servers. Here's 2 x 2GB for $135: http://www.upgrade-solution.com/det... EDIT: you can scratch the above...I just realized that you're asking about a notebook, not a desktop. It also looks there's about 100 different models in the M2000 series: http://h10025.www1.hp.com/ewfrf/wc/... And I don't know where you got your info from but according to Crucial, your notebook accepts a max total of 1GB, 512MB per slot. http://www.crucial.com/store/listpa...

an additional point, you will often see pc2700 ram stated as 333mhz. DDR means double data rate. the real true speed is 166mhz but the 'effective' speed is like 333mhz. so if you see ram that says pc2700 333mhz do not assume it is not the right one.