> Next time I play TF2, I must remember to open the monitor *first*. ;-)

Can't you play TF2 in windowed mode?  Or download some game demo that can be 
played in windowed mode.

> I wonder why it gets so much hotter running a real game (which is 
> optimised to run smoothly) than running a stress test (which is designed 
> to use up as much GPU resources as possible)...

I guess the stress test wasn't written very well, or without the knowledge 
of your particular card.  Lots of things in the GPU can be the bottleneck, a 
well-written stress test should work this out and adjust the test details so 
that every part is almost at maximum throughput.  If it's not very well 
written, then - for example - the vertex shader might be loaded at 100% 
while the pixel shader and texture lookup units are sitting idle for 90% of 
the time.

BTW what is the CPU load during the stress test and TF2?  Maybe that is 
affecting the GPU temperatures?

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