I am using a $70 retail EFA board with the K6 266mhz ( www.efacorp.com ). It had no documentation for the 266 but I noticed jumper settings that matched the K6's specs. Viola! I have a 66mhz K6 that benches @ around Pentium 412mhz. This means that the BIOS doesn't recognize the chip's speed yet the operating system does. Later, I downloaded a BIOS upgrade from the EFA site and was pleased at how easy and well it went. BIOS reports 266mhz now. Pretty good deal @ 70 bucks for the board and 120 for the chip. Of course, within hours of use, I'm already used to the speed and ready for 400+mhz.... welcome to the world of multimedia computing, people! gary r. tennesen [log in to unmask]