E8500 with an abit I-G31 motherboard

oh another thing is, an older version of cpu-z is telling me that the clock is what its meant to be, but the bios, a newer version, and core temp are all saying thatthe clock is 2.0ghz.

Yeah, the newer processors will drop their multiplier (lowering clock speeds when not under load) to save energy if your mobo supports it. You can turn it off...especially for overclocking.