ON Monday, September 28, 1998 6:13 AM Capt. Zyla wrote: I have a 486DX-100 that has 4 72 pin simm sockets on the board. According to the user manual I can install just one 32 Mbyte 8X32 simm to give me 32 Megs. Most of the 72 pin simms seem to be EDO Ram chips. Will there be a problem using EDO ram in this computer? Also if I buy more memory do I need to buy only EDO ram or can I mix them? Should I expect any speed improvement with the EDO Ram? Capt. John M. Zyla You haven't provided enough information to answer your most important question, "can they be mixed?" I have some 486 boards that do and some that don't. Failure to mention EDO in the manual is not proof that it won't work. You have to give it a try. However, if your CMOS has a RAM type setting, you will not be able to mix ram types. If you don't have a RAM type setting in CMOS, you can experiment to find out what the board will work with. Fast Page (non-edo) 72 pin simms are not hard to find. For a bonus to a friend, find someone who has Fast Page installed on a Pentium and swap him for 2 16 meg EDO simms. You will save a dollar or two and he gets better ram. Some 486's have the capability to gain a slight performance boost from EDO, some don't. Tom Turak ----- **Need help with PCBUILD mailing list? Send an Email to:** Bob Wright<[log in to unmask]> or Drew Dunn<[log in to unmask]>