peltier cooling = ive used 2-3 setups before, and honestly....its by far the most inconvinient method of cooling a processor
here is a very good piece of reading material on this - and explains everything:
http://www.xtremesystems.org/forums/showthread.php?t=38367
.....too acquire good cooling with a tec, you will need a good peltier plate - there is a formula in that reading material that will give you an approximate temperature that you should have after the entire setup - you will be surprised how ugly it can get ....
with that 72watt peltier i would excpect the temperature to skyrocket - honestly....
good reading right there in that link
....my recommendation for cooling is to simply invest money in a good heatsink and a good case
edit: also..when i say you will need a good peltier plate, i mean something with a much larger watt rating - but that also backfires...the larger watt rated pelt plate you get, the more temperature you have to take out with another way of cooling it