Umm, the multiplier in CPUs is always a nice round integer or integer + 0.5. In this case, the P4's multiplier is fixed at either 24 or 18 depending on whether it's an A or B. So the culprit is either that the FSB on the motherboard is set a tad low for some reason or that the 2387 is an incorrect reading.because the marketing value almost never is the value you see in your bios