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The Test

So we've discussed the heatsink and accesories that we are going to test. I decided to use the Soltek SL-75DRV motherboard for this test as it features not only onboard CPU temp monitoring but also a connection for a thermistor that can be mounted between the CPU and heatsink. Expect a review of that board any day now. Testing was conducted inside the Addtronics 7896A full tower case. I have to mention that this is easily the hottest running CPU that I have come across as the numbers will show. I may have received a fluke unit but I would be very wary of running any 266 MHz FSB Athlon with an inferior HSF. Both units were tested at idle and also after a continuous loop of Quake III arena was allowed to run for 30 mins. To be even more sinister I allowed the room temperature to reach 85 degrees F. I was forced to report the temps from the onboard temperature probe as having the copper spacer in place makes it impossible to mount a thermistor between the CPU and HSF.

Big MoFoHo
Idle 117 degrees F
Load 124 degrees F
Socket AHO
Idle 124 degrees F
Load 143 degrees F

We expected good things from the Big MoFoHO and it certainly delivered. With only a 7 degree difference between idle and load temps we can see the efficiency of the heatsink. The Socket AHO was released when SocketA CPUs were under 1 GHz in speed. Have a Duron 600 or Athlon 700? That cooler is plenty good for that purpose. It is quite obvious that it isn't designed for the massive heat output of the new 266 FSB Athlons and that is very evident by its 19 degree temperature spread between idle and load. Another thing I found interesting was the fact the the smaller Socket AHO's idle temp was the same as the load temp for the Big MoFoHo.


So sometimes bigger is better. The Big MoFoHo has a lot more going for it than size. Add the ultra quiet fan and it makes for a very awsome cooler. The only thing that kept this heatsink from being perfect in my eyes was that it may not fit every motherboard out there. Perhaps with a little filing you could clear the capacitors on your motherboard if the fit is too tight. At $27 the Big MoFoHo is an investment that you can use again later when you move up to another CPU.

At $8 each I think everyone running a SocketA CPU should pick up a Socket A Spacer and Arctic Silver II compound. In my testing it is quite evident what a great combination these two make with the Big MoFoHo.

Victor Oshiro August 23,2001


Web Target PC


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