I'm sure MH knows this already... but I thought I'd mention if for others. This is a known problem with Intel chipsets. If you put your T7300 into a NVidia or AMD chipset and do a BSEL mod it won't lock the multiplier. This is Intel's way of preventing overclocking. You could get around this by doing a PLL FSLx mod so the CPU/chipset believes it's receiving a 200Mhz FSB signal, but the PLL is outputting 266Mhz instead. Requires altered RAM timings as well. Only exception being SU4100/SU7300 CPUs can be successfully BSEL modded to 266Mhz. This is how the Alienware M11x and Asus ULx0VT systems do their overclocks.