Fan behaviors Nexus and Slipstream 800 (impedance effect )
Posted: Thu Jul 23, 2009 1:02 pm
Hi!
I ran intresting thing today. With my new Scyte KazeQ fan controller 5v~12v fan range +/-10% I started testing fans.
Scythe Slipstream 800 rpm @ minimum 450~420 rpm. Around 5v. Slightly over. Nexus in free Space 545 rpm's around. Well with-in 10% tolerance. Nexus in heatsink and minimum speed rose around 620-640 rpm's. Quite intresting. When I closed case door Nexus fan speed rose into 660 rpm's +/-10 rpm's. (Sample variance difference was 13-24 rpm's between two nexus 120mm rs )
Similar thing happened with Another Nexus fan too. Heat sink and case closing seemed to rise minimum rpm's around 100 rpm's. I wonder why.
I have top Down Noctua C12P heatsink and case is Solo.
All Scythe fans seems to operate well with-in the 10% margin but Nexus fans seem to... operate a lot higher than they ought. Maybe heatsink has something to do but I expected maybe 600 rpm's maximum with 10% error if Nexus 120 RS' fan speed is around 490 rpm's @5v.
its intresting that Scythe fans are just few dozen rpm's what they ought to be compearing to SPCR fan testings. Nexus fans are nearly 200 rpm's higher. This makes me puzzling.
As mentioned Nexus fans were around 50 rpm higher in free space what SPCR tests @5v were: 490 rpm's. Against dop town heatsink and closed in case minimum rpm still grew nearly 120 rpm's...
Just wondering if Back pressure has anything to do with this... Or what.
Edit:
I made tests with 800 RPM Slipstreams which ran in air 810~824 rpm so variation was 13 rpm's.
Now on heat sink fan stayed about 810 rpm's
Exhaust was 815-824 rpm's when side panel was off. When side panel was on Heat sink is 807-813 rpm's
exhaust is 880-890 rpm's.
Simply closing the side panel in solo put about 60-70 rpm's more on exhaust fan without touching the manual control's. That is quite leap just closing the side panel...
I ran intresting thing today. With my new Scyte KazeQ fan controller 5v~12v fan range +/-10% I started testing fans.
Scythe Slipstream 800 rpm @ minimum 450~420 rpm. Around 5v. Slightly over. Nexus in free Space 545 rpm's around. Well with-in 10% tolerance. Nexus in heatsink and minimum speed rose around 620-640 rpm's. Quite intresting. When I closed case door Nexus fan speed rose into 660 rpm's +/-10 rpm's. (Sample variance difference was 13-24 rpm's between two nexus 120mm rs )
Similar thing happened with Another Nexus fan too. Heat sink and case closing seemed to rise minimum rpm's around 100 rpm's. I wonder why.
I have top Down Noctua C12P heatsink and case is Solo.
All Scythe fans seems to operate well with-in the 10% margin but Nexus fans seem to... operate a lot higher than they ought. Maybe heatsink has something to do but I expected maybe 600 rpm's maximum with 10% error if Nexus 120 RS' fan speed is around 490 rpm's @5v.
its intresting that Scythe fans are just few dozen rpm's what they ought to be compearing to SPCR fan testings. Nexus fans are nearly 200 rpm's higher. This makes me puzzling.
As mentioned Nexus fans were around 50 rpm higher in free space what SPCR tests @5v were: 490 rpm's. Against dop town heatsink and closed in case minimum rpm still grew nearly 120 rpm's...
Just wondering if Back pressure has anything to do with this... Or what.
Edit:
I made tests with 800 RPM Slipstreams which ran in air 810~824 rpm so variation was 13 rpm's.
Now on heat sink fan stayed about 810 rpm's
Exhaust was 815-824 rpm's when side panel was off. When side panel was on Heat sink is 807-813 rpm's
exhaust is 880-890 rpm's.
Simply closing the side panel in solo put about 60-70 rpm's more on exhaust fan without touching the manual control's. That is quite leap just closing the side panel...