Hi all. I have been irritated by the bad design of the Abit Otes thingy. First of all it's to noisy. And if you smartly reduce the fan revs, it's not very effective anymore. I now run a P4 3.2E Prescott OC'd at 3.9 MHz. These chips need a LOT of power.
I just wonder how the Abit engineers thought that sucking hot CPU exhaust air past some bad-design-mosfet-heatsinks that are not even fitted with any thermal paste would do a lot of good for the PWM temps. At least they could have turned the fan around so that it sucks cool air and blows cool air onto the mosfet sinks.
Anyway, I decided to 'make it better' and cut the plastic Otes casing so that I only had the fan housing left. I took a 4x4cm Papst CPU fan with tacho, and replaced the Abit fan with it, blowing cool air onto the mosfet sinks. I also fitted OCZ copper ram-sinks on the mosfets.
The result is very convicing, see temps below. These temps are taken with a temperature sensor, directly on the fet casings:
before: idle 42 load 67
after: idle 37 load 48
I just wonder how the Abit engineers thought that sucking hot CPU exhaust air past some bad-design-mosfet-heatsinks that are not even fitted with any thermal paste would do a lot of good for the PWM temps. At least they could have turned the fan around so that it sucks cool air and blows cool air onto the mosfet sinks.
Anyway, I decided to 'make it better' and cut the plastic Otes casing so that I only had the fan housing left. I took a 4x4cm Papst CPU fan with tacho, and replaced the Abit fan with it, blowing cool air onto the mosfet sinks. I also fitted OCZ copper ram-sinks on the mosfets.
The result is very convicing, see temps below. These temps are taken with a temperature sensor, directly on the fet casings:
before: idle 42 load 67
after: idle 37 load 48