I have a Pentium 166 machine. The motherboard has 4 simm slots and 1 dimm slot. I had 32mb of simm ram and I wanted to upgrade it. So I bought a 128MB dimm ram and put it in. I also removed the old 32mb ram. The funny thing is it only recognize 32mb out of 128 on the start up(system info in control panel also shows 32mb). The 128MB ram is good because I tried it on another computer and it showed 128. What is the problem here? Is my motherboard too old to support 128MB? Bad dimm slot? Please help. thanks a bunch. Peter

you'll have to check the mb manual to see what kinds & amounts of ram it will take

what speed is the ram? 66, 100, 133 if it is the wrong speed for your motherboard than it won't see all the memory. You more than likely need a 128 66 speed for the slot to recognize it.

Does this motherboard have an intel 430VX chipset. If it does there are "issues" with Sdram on this chipset. Here is some info: http://www.gcscanada.com/support/kb/docs/102.htm Good that you removed the Simm, don't want to mix types. Simms will probably be most successful on this motherboard, which is too bad since they are much more expensive than Sdram right now.

motherboards are limited to how much memory you can place in it and what size dimm or simm you can put in in which is probably your case

Some motherboards that support the mixed ram slots, also have a jummper on them, that is used to set wich ram bank to use. You are most likely to see this if your board has an AGP slot and simms and dimm slots. If you got AGP look in you mb manual to see if there is a jummper that sets the speed for your memm bus. I used to have a soltek 54u1 that did this same thing.