Re: Running without Northbridge fan
most chipsets are ok running without a fan on the northbridge but if you're temps are up or you plan on overclocking then either a third party passive cooler or an active cooler is probably advisable.
You'll know if its getting to hot - your system will lockup and crash all the time.
Intel core I7 920
6GB OCZ platinum 1600
Samsung 1TB F1 Spinpoint
Samsung SM2443BW 24"