Hi I have a dell dimension xps t450 with a pentium III 450Mhz processor. I just got a 733Mhz pentium III 256k cache 133Mhz bus, and I tried to replace my old processor with the 733Mhz one. THe computer starts up, but nothing comes up on the monitor, it stays black. I have to unplug the machines just to turn it off. It doesnt even give me the regular beep when the computer starts up. I have no idea how to make it work! Could anyone help me figure out how to change or upgrade my bios to make it work? Or are there any other methods, any help would be greatly appreciated. Thank You!