msmeenge: A Core i5-750 will need to use the turbo mode of the CPU to access the 21X multiplier. If a motherboard lets you select a 21X multiplier then it is supposed to turn on turbo mode at the same time. Make sure turbo is enabled in the bios just to make sure. You might also need to have SpeedStep (EIST) enabled on some boards and update your bios to the latest version in case there's a problem with it.
RealTemp and i7 Turbo will give you an honest look at your multiplier.
http://www.fileden.com/files/2008/3/...alTempBeta.zip
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