For sale is an Interware 240MHz G3 upgrade card Booster for Power Macintosh 6400 and 5400 models with an L2 Cache Slot. Although not officially supported, it is also supposed to work in the Apple TAM (Twentieth Anniversary Macintosh).

Fast and careful shipping from Tokyo, Japan. Free economy shipping to the US, affordable shipping rates to the rest of the world. Please be aware of customs import fees in your country, however this falls within the duty free allowance for the US and no import duties are due. Also be aware of possible customs delays, particularly in the E.U.

Keep in mind that this is vintage equipment for vintage computers. Very specific knowledge of its era is required. Please carefully check your use situation and software/hardware compatibility. In other words, I’m not your tech support (but am helpful!), nor am I responsible if something breaks during installation.

I ship within 24 hours most of the time, but when shipping falls late on a Saturday in Japan, shipping will not be until Monday.