Premium was Road Runner's first foray into faster-tiered service levels, introduced in 2004 by Time Warner Cable. It offered 6.0 Mbit/s download speeds, compared to the Standard speed of 4.0 Mbit/s. It was later increased to 8.0 Mbit/s in 2005, when the Standard speeds increased. The Premium tier was later renamed to Turbo, and the speeds it offered continued to increase, as the Standard speeds continued to increase. Turbo was also the first service tier to receive the PowerBoost technology. Turbo Plus was a previously offered tier that was at a faster speed tier than Turbo, but slower than the future DOCSIS 3.0-based tiers. As Extreme and Ultimate tiers became available, the Turbo Plus name was retired.