Hello all,
I got a galaxy 9600GT low power low profile and put it in my acer SFF with only 220w psu.
I had the same over heating problems.
The fan would register as running at 100% all the time, except the fan would kick on, kick off, run inconsistently.
I was worried that the card was incompatible with the pc and that the faulty performance was caused by my tiny psu in some indirect way.
I RMA-ed it.
They sent me a new one.
I reinstalled it along with this:
http://cgi.ebay.com/Low-Profile-PCI...ltDomain_0&hash=item19b58157f1#ht_1222wt_1139
It's a low profile internal case fan that fits in a pci slot (X1 in my case, which is directly under the card).
I also drilled a bunch of some small holes in the top of my case for extra venting.
There used to be alot of heat being trapped at the top of the case (right where the card lives...).
So now the PCI internal case fan sits directly under the card blows upwards across it and out the top, while my CPU fan suck air in the side on to the CPU heatsink, and the GPU fan of course blows air across the GPU heatsink.
The new card runs beautifully now without a problem.
Idles at 45C, with a load it's never over 75C and the fan stays under 50%.
I think it is mostly because the old fan was busted, but the extra case fan doesn't hurt.
I don't have any more slots left in this little computer, but that is fine!
I sort of think I am trying to over do it with this machine anyway.
But its working fine, so I guess it's OK!