Ok, I was way off by a bit.
When using the term Watts for CPUs the real term is Watt hours. Therefore, 290 BTU/ hrs is the equivalent.
So, a 21,800 BTU transmission cooler is way overkill. Or is it?
I must keep in mind that the 21,800 rating is considered max heat ejection. (ie. traveling at 60 MPH.)
The efficiency of this tranny will drop off significantly when at idle. (No fan.)
Even at 2% efficiency a 21,800 BTU/Hr radiator is ejecting 436 BTUs of heat an hour. More than enough to cope with an 85 watt (290 BTU) processor.
Now let's look at a typical low drop cooler. 5"*5"*1"
These guys eject 1400 BTUs per hour.
At 2% efficiency we're looking at 28 BTU/Hr. Hardly enough to cope with a 290 BTU heatload of a 1400 MHz Tbird.
Whereas, the 12"*11" radiator at 7% efficiency is operating at over 100% the efficiency of the 5"*5" low drop cooler. Hmmm...
Now, somewhere along the line I'll be able to ascertain the actual radiant heat loss of a low drop transmission cooler.
I have a feeling it is more than 2% efficiency. Although, I might be wrong.
Richard999 (Jun 21, 2001 04:01 p.m.):
The question about a "quiet" case sparked my curiousity.
How large of a radiator would one need to keep a Tbird 1400 "relatively" cool? Let's get real crazy and say - without a fan?
Anyone have any numbers on how much heat a radiator can disperse with passive cooling?