What fan would I use on the Taisol 760?
Id probably go with a 80mm fan, due that its a very large heatsink, and the benfits of a 80mm fan blowing over all the fins would be great. Id probably use my own adapter
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Your only downsizing 2 sides but the other sides are still 80mm giving it that outtake to work optimaly and a path to breathe. Another way would be just to take the fan mount that came with the heatsink and cut it in 4, flip it pointing out and mount it by the inner hole (hard to explain, hope ya get it

). This will give you 80mm base to mount your fan, but problem with this is wasted air would expeled of the sides of the heatsink.
With the FOP just do the same thing as explained with Vantec, just mount a 80mm on top, no adapter! How you do it is 1 way is too take the clip, mount it on the opposite ends and clip it right onto the fan itself. Another way is to take a 80mm grill attach it to the fan and use the fan clips to clip on to the rings on the fan grill, i like this way better since its safer and cleaner.
The Vantec is designed to blow, but talking about fans that are meant to suck, alpha and hedgehog and such. Almost the same problem exist when using a 60mm to 80mm adapter. As the fan sucks the also suck ina spread fire, actully when sucking its even wider, and its sucking against the slope of the adapter. Theres very little space here, and gets less, this is bad. So again the fan would be working poorly not breathing freely and the fan is just spinning around not really taking in much air as it should.
92mm adapters, with blowing or sucking the problem is even worse! Cause the incline of the slope has to be even brauder degree, more of an angle, cause your going from 60mm to 92mm thats a big change. The fan would be even less efficent but due that 92mm fans blow so much more air it will sorta make up for the loss, it will have a tough time and will be
Fighting itself!
Past Discussion Of Adapters