Swiftech MCX4000 vs Thermalright SLK900U

Which one will be better assume both will be mounted with the same 92mm fan.
This will be install in Pentium 4 system which is very highly overclock ( 1Ghz overclock to be exact )
which will give me the lowest temperature ?
thanks.

Well I only have seen a couple things on the swiftys but they were all good. For one thing it is smaller so it might fit your board if the 900U doesn't. It also leaves the ability to make a peltier in the future without having to buy a new heatsink if I remember correctly. Your fan will make a big difference also though.

one is a square and one is like a rectangle. I am using Swiftech right now but really want to try to see if SLK900U was better or not.

Tut, if you ever do get the 900 be sure to post the results, I would be real interested in which one works better.