How slow is your cpu fan running?

niels007 · Post by **niels007** » Fri Dec 24, 2004 8:42 am

Just out of curiousity, what RPM is your cpu fan running (cpu fully loaded) and what sort of cpu / voltage is it cooling?

I keep being amazed at my own setup:
AMD Athlonxp 256kb cache 1980 mhz 1.54v

120mm Papst 4412FGL fan ducted to Thermalright SLK900A at 420RPM (below self starting voltage

) You can almost count the revolutions.

the max socket temp reported under prime is only 58 degrees with the internal cpu diode at 63..64.. I had diode temps up to 80 without prime failing so there is considerable margin left!

What do you guys get?

Niels

PS: I'm still using Thermalright supplied thermal paste.. Apparantly this Shin Etsu stuff (holding in my hands) is worth another 2 or 3 degrees.. or rather worth another 50rpm less

geforce1 · Post by **geforce1** » Fri Dec 24, 2004 9:14 am

Whoa, that's some crazy low speed (~ 10 CFM?). That is truly awesome though.

My system's got a Zalman 7000 on an AXP-M 2400+ @ 2.35GHz running at 2,300-2,800 rpm, Abit FanEQ- (on an Abit KV7) controlled (triggers max speed at 111F/44C socket temps but more concerned about 140F/60C+ PWM temps). It's fairly quiet at 2,300, but at max speed, the high pitch of the ball bearings is heard.

On my grandmother's system (an HP Pavilion A230n) w/ an AXP 2800+, a Vantec Aeroflow runs speedfan-controlled between 3,600-4,000 rpm to keep the CPU temp under 135F/57C degrees. It is FAR quieter and better than the stock heatsink (w/ a 70mm 4,500rpm Delta - OUCH!) that came with the machine. The CPU is good to 167F/75C+ degrees, but I want it to last.

nici · Post by **nici** » Fri Dec 24, 2004 9:28 am

0rpm, as is my GPU

EndoSteel · Post by **EndoSteel** » Fri Dec 24, 2004 1:50 pm

- ZM F2 ducted to a Volcano 7+ \ Palomino 2100+
- Titan 80x35 on a Hyper 6 (normal ATX case w/2 fans) \ Newcastle 3000+

Both spin at ~700RPM (they just won't start at a lower voltage), temps are ok.

Post by **Ralf Hutter** » Fri Dec 24, 2004 2:26 pm

The fan in system #1 (see my sig) is running at around 680rpm.

Edward Ng · Post by **Edward Ng** » Fri Dec 24, 2004 2:31 pm

0rpm; 2.2GHz K8 with an XP-120 at 1.35V.

josephclemente · Post by **josephclemente** » Fri Dec 24, 2004 3:19 pm

My ducted Zalman 7000Cu works great at zero RPM. (P4 3.0C stock speed & voltage).

Bluefront · Post by **Bluefront** » Fri Dec 24, 2004 4:38 pm

Heh....just what does this all mean? My C3 @733mhz has no fan at all on it's little heatsink. I think there's a little fan somewhere in the SFF case. It does make some noise.

JimK · Post by **JimK** » Fri Dec 24, 2004 5:35 pm

0 RPM, it's passive.

The L1A cools the Maxtor HDD.

Trelane · Post by **Trelane** » Fri Dec 24, 2004 9:21 pm

1500 RPM. Zalman 7000A-AlCu on a P4 3.0E (Prescott). I may actually be able to cut that back some more since I've improved my case's airflow situation somewhat.

EvoFire · Post by **EvoFire** » Fri Dec 24, 2004 10:52 pm

AXP 2600 Barton, 2800rpm 80mm fan @ 38C..... its the Spire WhisperRock IV.... maybe something that I shouldn't have gotten...

Slaugh · Post by **Slaugh** » Sat Dec 25, 2004 12:13 am

Zero RPM also! Thanks to the Reserator!

Post by **Ralf Hutter** » Sat Dec 25, 2004 8:34 am

minus 700rpm!

e-penii++!

Mine runs backwards and sucks the hot air back into the CPU. The damn CPU runs so cold that I'm afraid it will frost up without some extra heat.

ceraf · Post by **ceraf** » Sat Dec 25, 2004 9:26 am

around 1000-1200 rpm. I could run it passive, but i can barely hear the fan anyways.

When my heater broke one night, I didn't even need any fans...it was 14 C in my house.

greeef · Post by **greeef** » Sat Dec 25, 2004 9:42 am

0RPM

cnps6000, just underclocked my cpu til it ran stable at reasonable temperatures.

echoes · Post by **echoes** » Sat Dec 25, 2004 8:55 pm

My XP mobile 2200+ is cooled by an 80 mm L1A at 1% (in Speedfan), how many RPM that is, I don't know. It hovers around 45 C.

x1m · Post by **x1m** » Sun Dec 26, 2004 10:15 am

1500rpm, 2500+ at 3200+, 53 on load, ambient currently 23.4. Zalman 7000cu + arctic five with botched heatsink install :]

Edit: inability to type.

andyb · Post by **andyb** » Sun Dec 26, 2004 12:34 pm

Athlon 64 2.2Ghz Newcastle core, Arctic Cooling Silencer 64 Ultra TC.

At night, cooler house, drops below 666 RPM (lowest the motherboard sensor can go) usually 32-36 degrees.

During the day, sub 900 RPM, usually 39-41 degrees.

And all the way up to 1600 RPM @ 62 degrees maximum ever hit.

The box says between 1000-2500 RPM.

It turns itself of if I take the side off of the case.

Andy

wing · Post by **wing** » Sun Dec 26, 2004 3:52 pm

About 1120 RPM. It's a Nexus 120mm fan at 12V, CNPS6500, Northwood 1.8GHz. 53°C when running CPU Burn, 47°C when folding, about 35°C idle.

Edit: After quitting cpuburn, the cpu refuses to go back to 47°C, it is now doing 49°C folding

EdT · Post by **EdT** » Sun Dec 26, 2004 8:30 pm

AMD XP 2000+ with GlobalWin CPM25603-32(Super Socket 7 fan/sink) with Thermagon aluminium oxide thermal paste control the 40mm Delta fan from 4500rpm to 2500rpm with Sunbeam Reobus. Ambient: 23.4C- CPU: 40.2C.

palled · Post by **palled** » Mon Dec 27, 2004 2:09 am

0rpm; 2.0GHz Pentium M Dothan 725 with an XP-120 at 1.35V. Completely fanless minitower open top.

SebRad · Post by **SebRad** » Mon Dec 27, 2004 10:58 am

Athlon XP2500 @ 2.2GHz (XP3200). Zalman 7000A-AlCu 1000-1100 rpm. Runs full load 24/7, diode temp about 35°C above ambiant, currently 50-55°C.

poohbear · Post by **poohbear** » Mon Feb 21, 2005 2:24 am

Just wondering, those of you running on 0 rpm and who aren't underclocking ... do you have any other fans running in your case? (including if you are using watercooling)

teejay · Post by **teejay** » Mon Feb 21, 2005 2:49 am

Athlon XP2800+ @ 2200 MHz, heatsink from CoolerMaster Aero7+ (all copper), 80mm Nexus:
- browsing etc: 900rpm, 41C socket, 48C diode
- CPUburn: 1150rpm, 50C socket, 62C diode

Athlon 1GHz, large alu heatsink of distant CoolerMaster origin, 80mm Nexus:
- light load (ftp, database): 900rpm, 50C heatsink through AeroGate sensor (mobo sensor long broken)

Off-topic: these heatsinks are the only place I've ever used silicon fan gaskets with some success.

ckolivas · Post by **ckolivas** » Mon Feb 21, 2005 3:19 am

P4 3.06 running at 3.20GHz
Zalman 7000Cu with a custom modded silenx 92mm fan running just above threshold for turning my guess is ~800rpm no rpm monitoring. I get 60 degrees cpu load under full cpuburn x 4 load at ambient 30 degrees. It's a fairly open case though.

StarfishChris · Post by **StarfishChris** » Mon Feb 21, 2005 4:54 am

1000RPM (stock fan). I can't hear it above the TruePower fan so it doesn't matter right now, and it keeps temperatures below 40 so I'm happy.

Edward Ng · Post by **Edward Ng** » Mon Feb 21, 2005 5:11 am

poohbear wrote:Just wondering, those of you running on 0 rpm and who aren't underclocking ... do you have any other fans running in your case? (including if you are using watercooling)

If you see the Staff Rigs sticky in the Gallery, you'll see my former silent rig fan a Pentium 4 2.0A at full voltage with an SP-94, fanless. I utilized a cold air duct and negative air pressure to pull cold air across the heatsink, rather than installing a new fan on it. This was easily done with a low heat output video card, a fanless 9600, and a 2.5" laptop drive inside a SilentDrive, so I used masking tape to seal off all openings except the side duct to maximize air flow. Besides the undervolted 80mm AcoustiFan exhaust, there was the PSU fan too, a slow-spinning undervolted 120mm AcoustiFan.

The new system that has since replaced that one has a 2GHz NewCastle, undervolted at stock speed, with fanless XP-120, again ducted and flowed using negative air pressure. The new build also has a fanless 6600GT, to which I installed a VM-101. The hard drive remains the same, a SilentDrive-enclosed 2.5" drive, and again, I used masking tape to seal off most openings. This time, however, because I have an undervolted 120mm exhaust fan as well as a 120mm PSU, I left an opening from the back panel beneath the exhaust, along side the side intake duct, so that I can cool both, the CPU and the GPU, using negative air flow.

One day when I have time, I'll add this new build to the gallery...

-Ed

Post by **Rusty075** » Mon Feb 21, 2005 5:42 am

poohbear wrote:Just wondering, those of you running on 0 rpm and who aren't underclocking ... do you have any other fans running in your case? (including if you are using watercooling)

The 120mm fan in the PSU is the only fan in the system. Can't check the RPM's (and don't particularly care) but it only runs at about 4.5v, so it can't be going that fast.

JanW · Post by **JanW** » Mon Feb 21, 2005 6:19 am

AMD Athlon XP 2500+ (Barton) @ stock speed, Vcore 1.475V (reads as 1.50V with lmsensors),
HSF: CNPS 7000A-AlCu modded w/ Nexus 92mm fan, running @ 5.1V (Fanmate2 @ lowest setting). My guess is that that's around 400-500 RPM.

EDIT: This is the second Box in my sig. It's folding 24/7. See my post in the Gallery for more info.

poohbear · Post by **poohbear** » Mon Feb 21, 2005 1:19 pm

Wow, well hope to add mine to the list soon too! So it seems everyone is using at least one 120mm fan in their system still. That's what I'm hoping to do, now that they've come out with fanless PSU's which is a long way from my last upgrade a few years ago when I spent $200 to import a Q-technology one from quietpc in the UK!

Hopefully by my upgrade in the next few years, they'll come out with fanless CPU coolers without the need for any additional fans at all.

What's a VM-101 by the way?