Paint Your Fans
Abit BP6 90 mm Dual Celeron CPU fan
Adding a Windows to a Disk Drive
Addendum - Backing-up Cassette to CD-R
Backing-up LPs to CD-R
Stress Testing Your Computer System For Stability
Abit BP6 90mm
Dual Celeron CPU Fan
When I first
assembled my Abit BP6 motherboard, I had two small 60mm CPU
fans, one per CPU heatsink. Since I overclocked the 366 MHz
Celeron processors to 505MHz (92 MHz FSB), I replaced the
generic fans with larger, more powerful, 60mm Panaflo fans.
Over time, the added noise of the Panaflos started to annoy
me. They weren't extremely loud - there are plenty of much
louder fans out there; I just didn't like the noise. To make
matters worse, I had placed a small 486 fan on the 440BX heatsink,
thus adding to the noise.
was to replace all three fans with a single large 90mm Panaflo
fan. My choice of fan was simple enough - I have a box of
recycled parts and this particular fan was sitting there begging
to be used. I wired it up to 12VDC and found it to be surprisingly
quiet. Most important of all, it moved a massive amount of
My first attempt at mounting this fan was to simply screw
it to the existing heatsinks with one screw in each of the
two heatsinks. The remaining two screwsholes in the fan were
unused. The picture below shows this version :
You'll notice that the fan is mounted to blow air down onto the heatsink.
There's some debate over which airflow direction is better.
For my use, it really didn't matter. What did matter was that
this simple mount didn't provide enough support for the lower
part of the fan which basicly just dangled. If I screwed the
fan on tightly, I risked placing the rotating blades too close
to the heatsink fins. With the majority of the fan unsupported,
this led to the blades occasionally touching the heatsink
- not a good thing !
simple solution, I took some thin 1/4 inch plywood and cut
two shims. The shims served several purposes.
seperated the fan from the heatsink to avoid the potential
covered the outside portion of the heatsinks - the parts
not covered by the fan. This forces air to travel between
the fins in those regions and through the fan for cooling.
I reversed the fan and mounted it to pull air away from
the CPU for this reason.
allowed me to tighten the screws on the heatsink to avoid
allowed me greater flexibility for screw locations. I no
longer had to mount the fan at the far upper corner.
Here's the resulting fan mounted over the heatsinks.
the large fan circulates a lot of air over the motherboard,
cooling not just the CPUs but also the 440BX chip (under the
green heatsink) as well as the many voltage regulators around
the processors. It I had to do it over again, I'd use a 120mm
fan to make mounting even easier (it would cover both heatsinks),
and run it at a lower voltage for even less noise.
contents in these pages are provided without any guarantee,
written or implied. Readers are free to use them at their
own risk, for personal use only. No commercial use is allowed
without prior written consent from the author.