PWMIC getting to hot on sli-d

[pablo]

where is this sensor or area so i could place a fan on it. it gets up to 53c when im gaming, which is alot hotter then the chipset gets. a pic would be great or whatever. thanks

[freecableguy]

Sensor looks like a small 2-legged tatalum capacitor (yellow) just above the heatsinks on the PWM MOSFETs. Don't cool the sensor though, cool the heatsinks on the MOSFETs (value added note: duh).

-FCG

[NightCrawler™]

Where the red arrows point are sensors... the ones near the heatsink/IDE ports are the ones for the PWMIC if I'm correct....

http://www.xtremesystems.org/forums/attachment.php?attachmentid=31648

NCâ„¢

[ozzimark]

close, but no cigar. look carefully at the PWM sinks (the set of 3), just to the left of the top one, there is a yellow thing. THAT is the temp sensor that is read as "PWMIC" :D
(all in accordance with what cableguy said :toast: )

[Flib]

Ozzimark is right.
But where is the case sensor?

http://img276.imageshack.us/img276/8418/dfislihotspotsweb7nc.jpg

[ozzimark]

Ozzimark is right.
But where is the case sensor?
to my knowledge, there is none.. just one for the pwmic, and a sensor on the nf4 chipset..

but i could be horribly wrong here ;)

[NightCrawler™]

close, but no cigar.
Dammit... I would have loved a cigar...... :(

NCâ„¢

[freecableguy]

i agree, no case ambient temp sensor on the DFI board

[Flib]

But under the Chipset is no sensor. There is only this one I have marked with the green arrow.
Maybe it reads the chips internal temp like with the CPU?

[freecableguy]

But under the Chipset is no sensor. There is only this one I have marked with the green arrow.
Maybe it reads the chips internal temp like with the CPU?

yes, internal sensor like the CPU diode

[high5]

afaik nf4 chipset doesn't have an internal sensor.

[largon]

high5,
I agree.

People with watercooled mcps have prolly noticed that directing a fan towards the chipset area you'll get about 3ºC lower chipset temp. The chipset sensor can't be ondie.

[pablo]

yea im gonna have to put a fan over those sinks cause they are getting to hot for me. so the sensor is telling the temp of the fets under the sinks correct. are the sinks glued on?

[dnottis]

Ozzimark is right.
But where is the case sensor?

http://img276.imageshack.us/img276/8418/dfislihotspotsweb7nc.jpg


Are you guys sure about that location in GREEN. I just setup a 70CFM 120 MM fan on there with my case open and my PWMIC temps are the same. I dont think thats it.

[Dissolved]

Are you guys sure about that location in GREEN. I just setup a 70CFM 120 MM fan on there with my case open and my PWMIC temps are the same. I dont think thats it.


yup thats it. use a temp probe on the mosfet sink next to it. see how it changes with the fan on or hot in comparison to the onboard temp probe.

[K404]

:cool: Guess the best way to find out is to move a fan around until the right numbers drop :) IMHO, the big sinks are there for a reason, so cooling them better wont hurt.

[largon]

are the sinks glued on?No. They'r soldered stright into the board.

[dnottis]

Has anyone actually found cooling the PWMIC to allow for higher OCs, if so how much higher OC and what were before and after temps?

[high5]

when OCing, you should cool Vcore VRM area.

why? well, like any other voltage regulation, its efficiency depends on operating temperature. in other words, less heat - higher efficieny. and the lower temps of regulation components are, voltage instabilites are less likely.