Odd issue with Abit NF7-S and Antec Truepower 430W

[Jeff7]

The alarm just went off on the PC in question, saying the PSU fan was at 0rpm. Well, it was still spinning just fine.
The problem: The NF7-S and MBM5 can't seem to decide how fast the fan spins. One second it's around 1700RPM, then suddenly 3500, then 0. The highest recorded speed though is just great - 337500. Yes, that's three-hundred thirty-seven thousand and five-hundred RPMs.
What the heck gives here? Is it just a setting in MBM5 that needs to be changed, like for the fan type or divider? All those seem to do is change the immediate reported speed, nothing else.
The board is using the latest BIOS, and MBM5 is the latest version.
In the meantime, looks like I'll have to just disable the alarm for that fan.

Oh, one bit of info - this PSU ran an Epox 8RDA+ just fine for a few months, and its fan speed was consistently reported around 1450rpms. And it never gave me these weird high and low figures.

 

[o1die]

Mbm 5 isn't perfect. They have a newer version that lets you select your mobo from a list, and it configers the settings for you. Out of the 8 settings, only 3 were accurate with my ecs board.

 

[Megatomic]

I get the same thing when I turn on AbitEQ. Most of the time it sees the fan on my Antec True380 as being off or running really slowly. But on my system I actually think the PSU fan is off or running slowly as my system temp is pretty low.

 

[Jeff7]

Seems like it's only the rev2.0 that does this; just occurred to me that my main system also uses a Truepower 430W, but it has a rev1.2 NF7-S. It reports a PSU fan speed of 1454RPMs.