I rigged the PcToys Fan to my computer. Its a large fan, maybe 80mm, maybe bigger, that runs at a nice quiet speed. Its rigged to sit RIGHT OVER and blowing onto the CPU, this way you can put any heatsink you want on, without taking the fan off....
So now I want to know whats the best heatsink? I have a 2400+Tbred Bcore.... Stock 2.0 oc'd to 2.2. Prefer to buy from newegg.com. Let me know
I hate to be the one to cast a black cloud on this idea, but having the fan any distance from the heatsink, even an inch, is going to greatly reduce it's ability to keep the thing cool.
Run a fan in open air and make note of the way the breeze from it disperses. It does not travel out of the fan in a straight line... it comes out in a cone shaped pattern on a very steep angle to the blades. Add to that the geography of your motherboard and it may well be that less than a third of the output of that fan will actually hit the heatsink and do the job you want.
It is likely you will end up with a very hot CPU no matter what heatsink you use in that arrangement.
There really is a good engineering reason why these things are built as they are and there is a solid reason why they all look more or less alike... that's what works. Fan on fins ensures all the air of the fan goes through the heatsink. Square boxy shapes are used to expose maximum cooling surface to the fan's output. Hybrid construction (copper bottom aluminum fins) is used to replace AMD's missing heat spreader.
Experimentation is fun and sometimes very educational, but heat sink design is as old as power transistors. It's very well understood at this point in time and I would worry that trusting any widely variant method might lead to trouble down the road...