The extra intake fan wasn't really needed, max CPU temps at full throttle, even in the hottest days, never reached 50C / 122F. It's just that I'm a deranged freak and love fiddling
From what I'm experiencing and what I read from other people who fiddled with Tuallys, seems Windows can't idle correctly the server Tualatins. Idle temps are abnormally high, 42C idle & 48C full throttle (while my OCed Coppermines idled at ~33 C). I really hated having to see an idle temp beggining with '4'
, even in the hot of summer, so proceeded to kill mosquitoes with heavy artillery
The grill comes from a '91 Mazda Miata NA.
Holes are large and pose minimal restriction to flow (just about half a degree of CPU temp empirically). Dino looks much better without a huge square hole in the front.
The golden front hub or spinner is some cosmetics flask plastic top. The black rear cone is cardboard cut & rolled to shape.There is method in this madness!
The center part of an Arctic Cooling F12 fan, as it comes from the box (flat bow & flat stern) ...
... behaves aerodynamically like a short cylinder (drag coefficient ~1.15).
With hub and cone its shape gets closer to the subsonic ideal rain-drop streamlined body (cd ~0.04).
Big boys know this well:
I haven't scientifically measured the results of hub & cone, but I can tell with them the fan is less noisy at full RPM. Which means less turbulence, which means they do some good
There is now a strong forced jetstream flowing straight thru the CPU heatsink.
Now at 27C ambient, CPU temps are 37C idle & 42C full throttle. Telvm happier
The progression of the dinosaur as recorded by the venerable TestCPU
Edited by TELVM, 15 July 2012 - 02:25 AM.