Please review the following before responding:
http://www.tomshardware.com/2006/05/..._41_ghz_cores/

I am thinking about building a new PC from scratch--it would be my first
self built machine. Can anyone explain to me in plain english what the
downside of using the 805 D and overclocking it up near 4.0 GHz would be?
The X2 athalon chips would be within my budget, but the tomshardware 805
setup looks like it out performs them if done right. But, what would I not
be getting with the 805? What is the tradeoff? Based on tomshardware, it
seems that the 805 overclock would require a lot more power, but does that
have implications other than needing a bigger power supply? Is it more
expensive to run in terms of electricity? I'd like to leave it on all the
time.

I'm not really a techie and would appreciate a plain english explanation.
Thanks a bunch!

Chalky, J.D.