I wanted to try replacing a 60mm fan with an 80mm fan via an adapter. Tests were done on a TBird 1.1G 100Mhz cpu using an ARX heatsink (60x60x40mm high and similar in size and construction to a Volcano II) and Arctic Silver II. The adapter for the 80mm fans is made from aluminum flashing and sits the fan about 25mm above the top of the heatsink. All test were conducted in a completely open case -- both sides and front fascia removed.
The original ARX fan is a 60x60x15 Fanner Tech FD06015B1H .19A
idle temp 31C cpuburnK7 41C
An 80x80x25mm Superred temp cpntrolled fan running at 1450rpm
idle temp 40C cpuburn 53C
A Sunon 80x80x25mm M fan at about 2500rpm
idle temp 34C cpuburn 45C
Noise was lower due to the lower frequency produced by the 80mm fans' lower rpms. But I was disappointed that the 80mm fans could not beat a fast 60mm fan. It's clear that a better (copper and larger) heatsink is necessary to use really low fan rpms on a cpu. But someone on a tight budget can make an improvement on the standard whiny 60mm fan at a slight increase in temperature.
Test data: 80mm fan & adapter on 60mm heatsink
Moderators: NeilBlanchard, Ralf Hutter, sthayashi, Lawrence Lee
good results from usage of the fan adapter there, in my experience with 60-80MM fan adapters they increase the temperatures of the heatsink for the cost of lower noise, this is because there is lower back pressure being pushed from the blades of the slower spinning fan, and the air get's crammed through the smaller 60MM opening....
A lot of ppl have commented that if u just directly stick the 80MM fan on top of the heatsink u get better results then if it is funneled through a adapter.
A lot of ppl have commented that if u just directly stick the 80MM fan on top of the heatsink u get better results then if it is funneled through a adapter.