The DDR Booster is an incredible device. Even at stock voltage of 2.9V, what I realized was when the DDR Booster was in the slot and running the DDR would overclock 2 FSB more than when it is not on the slot. This maybe OCZs patented PowerClean Technology at work. The PowerClean Technology gives the memory a cleaner and more stable power supply, resulting in more stable DDRs. Highest stable overclock speed on the Mushkin Level II was 252FSB (504MHz) with a 1:1 divider.