zalmon cnps9500 fan mod results

Associate
Joined
25 Jan 2010
Posts
1,177
Ive replaced the stock fan on the zalmon cnps9500 for an arctic cooling f9 pwm to see if lower noise/improved cooling could be acieved.

stock fan spec:

92mm
1,350rpm ± 10 % ~ 2,600rpm ± 10 %
Noise Level 18.0dBA ± 10% ~27.5dBA ± 10%
no CFM data.
7 blades

arctic cooling f9 pwm

92mm
600 - 1800 RPM (controlled by PWM)
Air Flow: 35 CFM / 59.5 m3/h
no noise level data
9 blades

test system see sig (overclocked quad [email protected])
test software prime95 & wprime v1.55

the zalmon stock fan was set at max speed for all tests
the arctic was set using pwm for all test via bios at (45c lowest setting)

prime95
results:
stock fan: f9
max t 45c 46c

wprime
1024m
43c 46

32m
37c 36c


idle temps:
both @21c

a noticeable noise reduction using the arctic f9 even at full speed over the stock zalmon fan. temps are pretty much similar with slightly higher temps with the arctic but it does only spin at a max of 1800rpm over 2500 rpm of the zalmon.

is it worth it? only if you want a really quiet machine and auto fan control.

more data is available if required.
next test fan:

AVC DS09238B12HPFAF
92 x 92 x 38mm pwm.
5000 RPM 104.07 CFM 51.1 DBA
 
This is interesting! I'd like to know what you manage to get out of the Zalman, I have one lying around somewhere which I used to use before going liquid cooled.
 
the problem i have is the minimum temp i can set in bios for target cpu temp is 45c which to me is too high. which means the fan ramps up in my opinion too late. never the less, its a successful mod and im still tinkering with speedfan & bios settings so maybe some improvements to be made.

as a side note i dismantled the cnps9500 completely removing heatpipes from the block and noticed no thermal paste between the inner components, ill add some next time which im sure will help heat transfer. the pipes and block didnt look like an exact fit so it should help.
 
Really, that's interesting, I'd have thought it put together well given Zalman is a reputable make! Let me know if it makes any difference, I might think about doing the same.
 
ok, its on & working.

AVC DS09238B12HPFAF
92 x 92 x 38mm pwm.
5000 RPM 104.07 CFM 51.1 DBA

wowsers when it gets going... fiddles around with pwm settings..
ok core temp stays at 45c with a fan speed of 3100rpm. full load.
full speed (ive only had 4500) core temp@42c


previous core temp has been higher recently??? pre fan change was 49-52c
 
i got the 9700 doing about 1500rpm keeps a phenom quad @ 1.475v at about 50 load. at that speed its quiet.
if i go for 4ghz at 1.55v, need boosting the fan speed upto max (where its pretty dam noisy...) otherwise temps get too high

however, i did replace the blue LEDs with white ones...
 
ive changed my sig, my rig is:

athlon IIx4 620@ 3.4 ghz. & 1.5v
gtx 260.
asrock k10n78 mobo & 4gb ddr2.

the stock fan was good enough and i liked the green LEDS - i could see when dust was building up on the fins!, similar kind of temps really, but i wanted to go pwm so had to change the fan and thought it would be interesting to see what could be achieved with this cooler.

so full load and o/clocked & 4800rpm = 41c @ the core. ambient temp 22.5c (jet engine)
1800rpm = 46c very reasonable
900rpm = 52 inaudable

ill be keeping the fan speed in the 1800 rpm range. and set the bios pwm cpu temp to 50c. so the thermal limit of this heatsink appears to be around 40c no matter how much air you throw at it. noise from the fan is perfectly ok upto 2500rpm. after 3500 rpm it really is tooooo much. at 4800rpm you really dont want be working in the same room.
 
Last edited:
Back
Top Bottom