Yesterday I bought a P4 2.26ghz processor, 533 FSB motherboard (Chipset 850E Intel) and 512MB of PC-1066 RDRAM (two 256mb cards). I put a new computer together with it, but the processor is only running at 1700mhz. The CPU/PCI Frequency setting on the motherboard and bios is 100/33, but it should be at 133/33 to run at 2266mhz. Whenever I set it to 133/33, Windows doesn't load and says there's an NDIS error, and something about a protection fault (I reformatted the hard drive and reinstalled Win98...same thing). When I turn off the computer and back on again, there's no video, and on the next boot the bios runs a safe mode thing and says the CPU settings are incorrect. The three options are Manual, 1700mhz and 2266mhz. Selecting the latter two adjusts the CPU/PCI Frequency setting accordingly; 100/33 and 133/33. With 1700mhz everything works correctly. The 2266mhz setting should work, because that's what the processor is! The ram is in correctly, and I even tried switching it around. There needs to be two blank ram cards in there too according to the motherboard instructions, which is what I have in there. The CPU is installed correctly with large heatsink/fan. I have a 400W power supply. What could be the problem?