the 9500 only weighs 530g,which is one of the lightest in its class. while the 7000B-CU weighs a whopping 755g. The big typhoon weighs even more, 813g.Yasu said:I wouldn't recommend the 9500 for a socket 478 because it's much heavier than what the mobo is supposed to handle and with no good support on the back of the mobo it may cause some problems. I have that same mobo(well, mine says X-series but I think it's the same) in my other computer and I put this Zalman HSF...
http://www.zalman.co.kr/usa/product/view.asp?idx=148&code=009
But if you want a little better cooling go for the all copper version...
http://www.zalman.co.kr/usa/product/view.asp?idx=147&code=009
Installation of that one is kinda difficult if you don't have much space in your case, so you may want to take the mobo out.