AMD cpu fan at 100%..ideas?

[dave343]

Having a bit of a heat issue...

I have a Dell Inspiron 530 case (pictures below but it's not mycase). I've always liked the front of the case and Dell's blue lights so I decided to keep the case, and upgrade the stock Q6600, to a Phenom 2 X4 955, with a Gigabyte board. Only mod I had to do was cut out the I/O sheild with a dremal (perfect cut btw, looks awesome). Originally the Dell was whisper quiet...before...

After the upgrade the PC has been running good, but loud! I was using the onboard HD 4200 and the noise level from the CPU fan was ok... but last night I tossed in a GTS 450 and now the PC sounds like it's ready for takeoff. It seems to be the CPU fan that's making all the racket, and it's running at 100%. I have 1 other case fan 80mm stock from Dell, that's plugged into the NB fan plug and it's also at 100% but definately not as loud as the CPU fan. This is also with the side of the case off

What I'm curious to know is why after adding the GPU the CPU fan kicked up to 100%. Temps for the CPU are around 44c Idle, haven't checked full load, but regardless even at Idle the CPU fan runs at 100%. I use headphones and the fan noise drowns out the headphone noise.
Temps for the GTS 450 are 35c Idle, and 60-66c full load Battlefield 2 BC. And as mentioned the side of the case I leave off.

It's actually a pretty nice case, it will fit a 5870 but since it stretches under one of the hdd racks you can only use 1 hdd. My PSU is Antec Earthwatt 500w.

Not my case...

 

[morningreis]

PC sounds like it's ready for takeoff

http://www.google.com/products?q=cargo+strap&um=1&ie=UTF-8&sa=N&hl=en&tab=wf

Should keep it from going anywhere...

Have you looked around your BIOS? On my BIOS I can change the CPU fan to anything from 0-100% or the "Smart Fan" setting. Most mobos have a feature like this.

 

[dave343]

I saw the SmartFan option in the BIOS but I didn't see 1-100%, there was Thermal,PMW?, and one other setting... and I believe it's on thermal, but it's at 100% when the cpu is idle at 44c...

 

[NIVO]

is that cpu fan plugged into the cpu fan header or a system fan header on the mobo? Also have tried a bios update on the mobo just to see if a fix may have been needed?

 

[Skull_Angel]

what kind of cooler is on the gts 450? if I remember right, the cards runs like the 470/480 (hungry and hot), so if it's dumping it's heat into the case it's probably the cause from the description of your case cooling.

 

[StewieTheGreat]

You probably do not have enough air flow in that case of yours and adding a Video card probably only made that worse,try adding a box fan pointing into the side of your case since you already have it open.


*sniped*

 

[dave343]

The heatsink fan is plugged into the correct plug and the bios was flashed to the newest a few weeks back.
What puzzles me is the fact that the 955 was running at 44c Idle before I added
the 450, and it's still running at 44c Idle after... but yet the fan now runs at a constant 100%.

The gts450 is not "hot", it's running at 30-35c Idle in windows... and the cpu hasn't changed idle
temps... it's as if the 955 got pissed I added the 450 and cranked up it's fan speed in retaliation lol.
Or...maybe it's that ATI runs better with AMD consiracy lol...

 

[sirmonkey1985]

The heatsink fan is plugged into the correct plug and the bios was flashed to the newest a few weeks back.
What puzzles me is the fact that the 955 was running at 44c Idle before I added
the 450, and it's still running at 44c Idle after... but yet the fan now runs at a constant 100%.

The gts450 is not "hot", it's running at 30-35c Idle in windows... and the cpu hasn't changed idle
temps... it's as if the 955 got pissed I added the 450 and cranked up it's fan speed in retaliation lol.
Or...maybe it's that ATI runs better with AMD consiracy lol...

yeah its still at 44C idle now because the fans running at 100%.. easy way to find out is go into your bios and disable cool 'n quiet and any fan control options.. it will lock the fan to 3800rpm +-10%.. bet anything it will idle at around 60C..