Another way of showing what the effects of this are is showing the differences in CPU/GPU TDP.
A test without and with the fan should show an increased TDP reading with the fan.
A test without and with the fan showing CPU/GPU Frequencies with sufficient load to demonstrate impairment and less impairment.
Both are viable... I can't tell from the posts what the gain is although I'm not doubting it in the slightest.
I didn't post any of those details because I didn't want to bore everyone but if you guys want to see them, I am happy to oblige.
A few caveats, these tests were done at my work where the building is kept at a nice 72F and I sit right under the AC which if I run the test at home where I keep the temp at a much more cost effective 77F the results are different, so your mileage will definitely vary. At work running the CPU test (without the fan) gives a minimum frequency of around 2GHz while at home it drops all the way to .8GHz which is what most people will see. I'm not at home so I can't run the tests now but perhaps later. For now, here are the results from work:
No fan
Fan
The Total TDP without the fan stays around 11-12 Watts while with the fan it stays around 15-16 Watts. And again, this gap was greater at home where the ambient was higher.