Fans revving up on MBP after installing Firewire audio card

Ok, so I finally upgraded my external USB sound card with the Profire 610 firewire unit from M-Audio.
While I am very impressed with the sound, I am not very impressed with what seems like erratic behavioiur from the fans on my MacBook Pro (mid 2010 - i5 processor, 2.4GHz, 4GB memory).
Even while just playing back sound files from the Finder, the fans rev up from the usual 2000RPM (idle) to about 2500RPM. iStat is showing between 0 and 1 percent total CPU activity, so this is making no sense at all.
I seem to remember reading about people having trouble with firewire sound cards on their 2008 (I think) models of the MBP, but, as far as I can tell, the problem is still real.
Are there any solutions? Do I need to go back to USB again? I'm pretty astonished by this, as I was always under the impression that going the firewire route would mean less work for the CPU than what's the case with USB, but as of right now that doesn't seem to be case at all.
I have connected external power to the Profire 610 just to make sure, but it doesn't seem to matter - it will still affect the fan speed.
Also: Just tried previewing a file from the file dialogue box in Wave Editor.
Playing through the Profire 610 results in the fans gearing up to 3500RPM - and staying there. Wave Editor is the only software running.
I switch to internal sound, but do not turn off the Profire. The fans stay at 3500RPM while previewing.
I turn OFF the Profire 610 and continue playback through internal sound card. Result? The fans slow down to about 2200RPM ...
So, amazingly, the firewire card results in the fans running about 1300RPM faster than when it's turned off. I never experienced anything like this with the USB card.

It sounds a lot like the behavior one see's on a MacPro with a internal card installed.
My suggestion is to install the free smcFanControl program and set the minimum fan speeds higher and just below audio level you can stand.
What this will do is keep the processors cooler and less likely to cause the fan rev spiking and annoyance.

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Triusa, welcome to the forum.
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Quote from: Henry on 04-June-09, 13:51:11
Looks like time to take it all out of the case and give things a test run on the table top. Take it all apart down to the bare MB and start from scratch and see what happens.
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Quote from: Bas on 04-June-09, 14:09:16
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Just back everything up... pop the dvd in; erase the partition in disk utility and create a fresh install of Snow Leopard.... If it's not hardware related everything should work... Sometimes it's not the update itself but applications of various and diverse users that can cause the problems... It would be impossible for apple to know about all the various combinations of software that can cause these problems.... When in doubt... I back my stuff up and install a fresh copy... (ERASE THE PARTITION) not just install over mac osx again. But have you tried installing over your copy of osx yet? Its not like windows... you don't lose anything when you install OSX again... You only lose your data if you erase the partition!!

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