I hope this is the right place to ask this and that it is "retro" enough. I have a Socket 7 machine that I am working on. It's my 1st PC from childhood that I restored, and now I would like to upgrade it.
The system is a FIC VT-502 with a Cyrix 6x86MX PR166 and (currently) 48MB of SIMM memory. The motherboard supports both EDO SIMM and SDRAM DIMM, as seen here: https://www.vogonswiki.com/index.php/Socket_7_Builds#Choosing_RAM
I want to upgrade to using 128MB of RAM and, if possible, use SDRAM (because I can, and because it seems to be cheaper). I found some SDRAM on a site called MemoryX (or MemoryTen), but when I installed it, each stick was only read as 16MB, for a total of 32MB! Here's what I bought, claiming to be 64MB each stick: https://photos.app.goo.gl/SurvJWmKxdrPbZ5Q8
Doing some research, I found http://redhill.net.au/b/b-98.html#ram which explains this issue:
most older mainboards do not understand 64Mbit [megabit] chips and see a standard 64MB [megabyte] DIMM as eight 16Mbit [megabit] chips
So, my question is what should I be looking for when trying to buy 128MB (2x64MB) of SDRAM for my system? Do I want single-sided or double-sided RAM? How many chips should be on the stick? Or should I just stick with SIMM and get 128MB (4x32MB) of SIMM?