Very high PWMIC temperatures

[Da_Teach]

I have been having some serious PWMIC heat issues. Reading this forum the average temp of the PWMIC should be below 50c ?

 

Well currently I have my case open, with a house-fan blowing inside it (yes one of the things you normally use to cool your room :cool: ), and its idle at 48c and will bump to around 55-60c under load.

 

However, if I where to close my case, and turn on the 3 case-fans (which strangely enough make more noise then this house-fan I have blowing in it now :eek2: ), it'll idle at around 55-60c and jump to 70-75 under load.

 

What is the cause of this much heat? And whats a good way too cool it? And can the PWMIC cause crashes @ 75c ?

 

Because using the case-coolers, with everything running 'so hot', I do notice system instability, which doesnt happen with the 'house fan' blowing inside the case.

 

System specs:

NF4 SLI-DR

AMD X2 4800+

Dual XFX 7800 GTX Extreme (running SLI ofc)

1Gb (2x512) OCZ EL DDR PC-4000 Gold VX (running at 3.3v)

2x 78Gb Raptor

 

And a side question will my system be able to handle an additional 1Gb of OCZ EL DDR PC-4000 Gold VX (e.g. all 4 slots filled with it) ?

[JOILNUVEN]

What's your amb temp.?...

 

A cause is sure your 3.3v on ram...(jumper leave on 4v!)...

what's your cpu voltage?...high volts on cpu increase the pw temp!

 

Use extra fan on power mosfet...and check again your case airflow...

 

And a side question will my system be able to handle an additional 1Gb of OCZ EL DDR PC-4000 Gold VX (e.g. all 4 slots filled with it) ?

 

yes, you can...but likely you must change the CPC on disable (2T)...

[ncsa]

Please provide the BIOS version running and note this in your Sig - review the rules

 

Ambient temps will have an effect ... also running only 3.3v with JP17 enabled means the voltage drop is large from 5v.

 

Ensuring that good airflow across the MB will assist in dropping these temps

[3]

I bet it's those XFX 7800GTX's, XFX is well known for having crap coolers, not to mention that the cards get even hotter when running in SLI.

[Tony_M]

I have mounted a 70mm fan over the PWMIC Area. I now have temps at full load under 40C.

[red930]

The PWMIC area will always be hot due to it's function of modulating the power provided to the system. The MOSFETS are rated to 110C so even though the temps seem high they're really well within limits.

[Da_Teach]

Disabled auto-reboot on BSOD, going to wait till I get another one to get a better understanding of what is crashing my system then. I suspected the PWMIC as its the only part that I always see lower temps off. I mean loads seem to mention a PWMIC below 50c under load. So figured 75c would cause issues.

 

The XFX's get hot too (the main card with case-cooling gets 75c and the 2nd one around 70c), but from sites that I've looked at, these normally go to 75-80c.

 

My room temp. is usually around the 20-25c. Not much warmer then that.

 

Switching to watercooling soon (ordered an extreme kit from Asetek with a 2nd VGA cooler), so everything except the PWMIC should get a whole bit cooler. I'll place a 120mm cooler in the side of my case to blow directly on the PWMIC / Memory area (as those memory chips seem to get rather warm too).

[typer77]

I just took apart my system (from running xp-90c to Dangerden.)

CPU temp - awesome - 31-44 at load (trying 1.40 Vcore + 110%)

But I also hooked up 2 case fans to the mobo this time around.

I noticed the PWMIC has gone way higher than before from 45C idle to 60 load.

In addition, I am running the Dangerden WC system (6 120 fans), 2 7800GT's, dual core CPU on the Antec TruePower 550W 2.0. I think the rails have gone down and it has done a lot to the instability of the system.

 

Will adding another PSU to regulate the WC / Fans help out the O/C instability? and HIGH PWMIC temp?