macbook fan noise...

[arrgrr]

Hi!

I have a problem with Reaper putting the fans on my macbook pro i7 into hyperdrive when (and only when) using an external monitor. This happens when nothing is playing, at any buffer settings and when the CPU is basically idle. It is worse with some plugins than others but no obvious pattern to this. The same plugins in other DAWs don´t cause this explosion of fan noise (and no other programs for that matter). So it looks like it is the GPU causing the heat (the macbook switches form internal to discrete graphics when plugging in an external monitor) but I can´t see why Reaper should be causing this. Is this a known issue with macbooks? Is there some way around this? It´s really too bad, it is practically a deal breaker for me.

Thanks in advance!

AG