SLK-900U and inverted fans

[STEvil]

Been toying with it for a while and I stick a 50cfm 80mm sunon on it, didnt do so well..

Put a fan below it with hub removed, did better...

Ducted the empty fan, did even better!

flipped the sunon fan over, did even better!


So, some results ;)

SLK-900U
XP-M 2500+ @ 2600mhz 2.03v (2.00v real load), Ricky tweak.
Abit nF7
Sunon 80mm 50CFM fan + fan with hub removed.

With the sunon blowing (ducted empty fan below) the CPU hit a high of 61c loaded with S&M

With the sunon sucking (ducted empty fan below) the CPU hit a high of 56c loaded with S&M.


As an added benifit the ducted fan housing between the SLK-900U and Sunon 50cfm fan make the sunon nearly as silent as a 60mm 35cfm fan.. pretty good!


Anyone still have one of those older Alpha pin-type heatsinks that worked best with the fan sucking? Maybe putting an empty fan housing between the fan and the heatsink would increase their performance a bit more? ;)

[EnJoY]

Cool discovery. I am already using an old 120mm fan with over the shell remaining as a duct for my 120x38mm Sanyo Denki on my XP-120. I may try putting it in a pull configuration though now...

[sky]

hey stevil got pics of that? either it's still to early for me to grab that concept or i just don`t get it. anyway, trying to put it into my words, so i see where i go wrong, if i go wrong. you took the "frame" of a former fan, used it as some sort of airtunnel for the real fan, atop that the sunon in sucky-mode. if that is correct, how does the shroud look? is it going all the way around the slk? or just covering the top sort off?
pics

[STEvil]

Pics tomarrow, i've been beating the crud out of this board for a week+ and i'm not gonna stop just now ;)

I used a glue gun to make the empty fan housing into a shroud so all the air is directed. None goes past the sides.

heres a simple diagram.

Red is airflow, dark grey is sunon fan, light grey is empty fan housing, blue are added ducts, and orangy thing is slk-900u.

[stealthbomber]

I tried placing a fan (hub removed) below the delta (both 80mm) that I have on the SLK-900A, it actually made the performance worse by a few degrees although I ain't tried it running in suck mode.

[STEvil]

pics!

http://www.wcroller.com/los/linkpics/slk10k1.jpg
http://www.wcroller.com/los/linkpics/slk10k2.jpg

EDIT

if you are wondering a out the metal bar with a bolt welded to the end of it (two actually, one each end), thats my 754/939 adaptor for the SLK-900U ;)

[Judaeus Apella]

sorry... wrong thread

[Skip]

i thought you were supposed to suck air out?

thats how i had it whenever i didn't use stock hsf. i think stock hsf blows air in though.

[STEvil]

Most (98%+) blow into the heatsink. This is why you try different things ;)