I Got this computer . On the post screen and in bios it says 166mhz. But yet the case looks like a atx The motherboard and its componets dont look like it has a 166 mhz processor. And it runs like it doesnt have a 166 cpu. It runs pretty good and i put windows xp in it What seems to be the problem. It cant be no 166 mhz processor .It is more like 500 CPU. Also when i put a modem in it ,The computer wont show no picture.When i take out the modem the post screen comes on