I am told that the duel radiators are not compatible on the top. Also that I should switch to the CORSAIR Hydro Series H80i Water Cooler. I know that the H80 will fit but I plan to do some overclocking. Duel radiators seem to cool faster and more efficiently.
Corsair Water Cooler H80i:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835181031
Corsair Water Cooler H100i:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835181032
Cooler Master HAF X:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119225
Corsair Water Cooler H80i:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835181031
Corsair Water Cooler H100i:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835181032
Cooler Master HAF X:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119225
. Its says no moding but what is person trying to say in the second sentence? "Some modding may be required for P/P, may fit some cases without modding, HW dependant. "