K6-2/400AFR-66 was a 32-bit x86 K6-2-based microprocessor designed and manufactured in 1998 by AMD. Manufactured using a 0.25 µm process, this MPU operated at 400 MHz with a FSB of 66 MHz consumed 16.9 W. Note that this is an identical model to K6-2/400AFR with a multiplier of 6 instead of 4 designed to support a 66 MHz bus instead of 100 MHz.