AMD-K6-2 AMD-K6-2/266AFR AMD-K6-2/3000AFR-66 AMD-K6-2/300AFR AMD-K6-2/333AFR AMD-K6-2/333AFR-66 AMD-K6-2/333AFR-66-2.2V AMD-K6-2/350AUZ AMD-K6-2/400AC AMD-K6-2/400ACK