When it came to the Cyrix 486DLC vs SLC, though, there was a noticeable difference. Both were essentially 386 chips with the additional 486 instructions bolted on but with no performance enhancements. The SLC was crippled further by using a 16 bit external bus just as the 386SX. People thought they were getting a 486-alike when the reality was was more similar to that 386SX.