PC Perspective posted a review on the new 800W power supply unit from ABS/Tagan

As we mentioned earlier, one unique feature found on the BZ800 power supply is a small slide-switch on the back panel that can be used to select either Normal or Turbo operating mode for the +12V outputs. Tagan claims "Turbo Mode" offers higher power to heavy-loading devices and "Normal Mode" for stable DC output. IMHO, that's just marketing gibberish. In reality the little red switch appears to either enable or disable current limiting on the six +12V outputs. This allows the unit to meet the current design standards by providing current limiters on the +12V outputs but allows the end user to disable current limiting, resulting in a single, high amperage +12V output.

ABS/Tagan BZ800 800W Power Supply Review