Just for the record, a Pentium 233MMX (or any Pentium MMX, for that matter) with split voltage will usually run fine in most single voltage motherboards and they're so cheap and easy to get right now that if you should burn one up from overvolting it's no big deal. The 200mhz K6 is single voltage with MMX and will also work as an upgrade for a non-MMX Pentium. If you're putting them in place of a WinChip, though, you're going to need more cooling as they run hotter than a WinChip. In something like a Netpliance I-Opener, that is most likely going to mean some case modding to make the heatsink fit.