Rise mP6 266
Another player in the x86 that didn't make it. Rise developed on the mP6 for years and finally launched it in three sorts; a PR200, PR233 and PR266 model. I have the latter.
I can't tell the performance of this CPU because mine doesn't work. Because Rise was out of the market again quickly, the L1 cache is only 16KB and it's just difficult to create a good competitor against the K6 and Pentium MMX I can imagine the performance is not going to be astonishing. The only thing the Rise mP6 has in it's favor is a 100MHz FSB.