Bought this memory as an upgrade for my Toshiba Satellite M70-164 and it works great. Just took the old memory out, snapped the new one in, started the computer and it was promptly identified. The improvement from 1gb to 2gb (I bought two of this) was very noticeable. Online navigation was smoother and I could have more sites running. When I work I usually have to keep 6/7 different sites running: Facebook, Box, an online spell checker, Youtube and another video content site, the site of the band I'm working on and the search engine, plus at least 2 office files and sometimes the audio player. With 1gb it was impossible to keep all this running smoothly. Usually downloads slowed down the whole system, or froze it altogether, even when all of this wasn't running. Haven't had this problem since the upgrade. I have been using it for about a month with no problems. Recently changed OS from Windows to Linux, no problems their either. Recommended.