|BEFORE and WHILE you are unplugging and plugging in ram modules, ALWAYS unplug the desktop computer or switch off the AC power to it, or if it's a laptop or netbook computer, unplug the AC adapter AND remove the main battery. |
Never randomly buy ram !
Ram modules that you might think should work in your mboard may NOT work in your mboard.
In the worst cases of ram incompatibility, the mboard will NOT boot properly, you get NO video, and the mboard may NOT produce any error beeps.
If the computer worked fine with the ram module(s) you had installed in it previously, remove the module(s) you installed and re-install the ram it had in it. The computer will probably then work fine.
Go to a ram manufacturer's or ram distributor's web site
or that or
if you have a generic desktop computer
and look up which sizes of modules and which module part numbers are listed for your brand name system model, or your generic desktop system motherboard model.
If you don't know your model, most web sites like that have a feature where, if you access the web site with the computer you want ram for, the mboard can be detected, and the right ram module part numbers listed.
Once you know which ram module part numbers are listed - work in your mboard for sure - you can get them from anywhere you like that has the same part numbers, and you can often buy those locally.