Cooling Mosfets

RussianMissile1 · Mar 21, 2004

which chips on the motherboard get hot other than the mosfets.

particualry on this motherboard: http://www.abit-usa.com/images/products/KD7A_lg.jpg

RussianMissile1 · Mar 21, 2004

bump!

come on guys, i know someone on here knows...

Sentential · Mar 21, 2004

Thats a VIA based board. You do not need to cool its MOFSETS. VIA boards dont draw alot of power.

The MOFSETS on that board are the 2 chips x 3 sets down the far right mid section of the board (based off that picture).

slater3333uk · Mar 21, 2004

Southbridge, Voltage reg chip, clock generator! If its warm then sink it

jonas007 · Mar 21, 2004

Mofsets, PLL's, and southbridge. Thats all I can think of.

SewerBeing · Mar 21, 2004

touch parts of the mobo if they are hot cool em

RussianMissile1 · Mar 21, 2004

Sentential said:
Thats a VIA based board. You do not need to cool its MOFSETS. VIA boards dont draw alot of power.

The MOFSETS on that board are the 2 chips x 3 sets down the far right mid section of the board (based off that picture).

hehe, i'd like to see you touch those mosfets, say bye bye to your finger. the PWM temperature is being reported at 66C.
thats a little high, dont you think?

what would the voltage reg chip and clock generator look like?

Tawcan · Mar 21, 2004

RussianMissile1 said:
hehe, i'd like to see you touch those mosfets, say bye bye to your finger. the PWM temperature is being reported at 66C.
thats a little high, dont you think?

what would the voltage reg chip and clock generator look like?

MOSFET burns are refered to as "the nerd tatoo."

Last summer for a robotic competition we had to make H-brdiges to control the motors. (A H-brdige consists of 4 MOSFETS and 4 transistors, basically allows the voltage to stay high and low depending on the input). Anyway, quite often the MOSFETS would get really hot due to misconnections in the circuit. Sometimes they would even burn... believe me, MOSFET burns aren't nice to smell. :-/

Hence the phrase "the nerd tatoo"

geofrancis · Mar 21, 2004

ive got the abit kv7 and the mosfets were hittin 84c on mine !!!

Barn_Angel · Mar 21, 2004

84?! inhuman.

MrBaz · Mar 22, 2004

Honestly, is there seriously any need for cooling of the mosfets? I don't doubt they get warm, but does it seriously help to sink them?

VAdept · Mar 22, 2004

It can /possibly/ help stability. Don't ask me, I have active cooling on my southbridge

(I had a tiny HS/FAN sitting around from some Thermaltake active ram coolers)

FatesWarning · Mar 22, 2004

What and where are PLL's? What do they look like?

Sentential · Mar 22, 2004

hehe, i'd like to see you touch those mosfets, say bye bye to your finger. the PWM temperature is being reported at 66C.

Oh wow...I had no idea. I guess its an Abit thing. Most VIA boards hardly get warm at all. I could run my gigabyte KT600 board without any sinks at all if I wanted, this includes the NB.

Yea if they are that hot sink em! All voltage regulators are MOFSETS. MOFSETs all look the same. They are a box with 2 voltage legs that are evenly spaced on the same side.

Tawcan · Mar 22, 2004

Kinda off topic I guess.... here are some pics to show you guys what burned MOSFETs would look like...

They were used on this baby below

slater3333uk · Mar 22, 2004

These are what the voltage reg chip/clockgenerator/PLL? look like on the nf7 im sure there simlar on most boards

iirc no.1 is tha voltage reg and 2 is the clock gen

Cooling Mosfets

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