Beggers belief
They changed the one on the mainboard not one on the CPU
Jeez Roy Rogers was a better cowboy than them.
They should have replaced the CPU fan first, thats the one that usually gets clogged op with dust or the bearings dry out when hot and casue it to seize.
The other one I'd bet you could stop and it wouldn't have much effect.
I have to be honest I'm not a fan of ABIT myself, but they do seem to run even with the little fan seized, one I had did a long time ago.
The fan on my AMD64 AM2 4800+ is overkill, I didn't used the supplied one but for £20 my cpu runs almost cold.
I hope now that everything stays okay 46 degrees is perfectly okay for a cpu temp