Hi

I'm bit worried about the mobo/case temps. I've tryed different apps showing the temps and so far

(cpu/mobo in celsius)
Asus Probe II: 18/43C
Speed fan: 18/43
(system=43, core=43, ambient=39)
core temp: core1/2=26/30
Room temps must be around 21-22C.

I have 120mm case fan, stock C2D fan (case wind tunneled), PSU has 120mm fan.
Asus P5K, E6750, 8800GTS 512MB (default settings)
(the case fan is operated from 5V PSU connector and not through mobo so cannot control the revs)

Last night when updating the OS, the mobo temps went up to 45C, which was enough for AsusProbe to give a warning. Because the CPU temps are so low I suspect it could be the GPU heating the system. I don't know where the mobo sensor is. It could be straight under the gfx card, dunno.

Anyway I tryed download nTune to check the gpu temps and set the fan. In idle the gpu was 61C (auto controlled fan in idle). This was bit high to my taste, so tryed put more revs (60% for a test) and now gpu is 47C after keeping it there for some time. Now the mobo temps are getting down a bit and Asus shows slow decrease and it is now 42C (and seems to stay there).

So What do you say. Should I try to lower the mobo temps some way and what would be a good level. In my old computer the mobo was 10C lower around 33-35C. Also if I keep nTune fans manually set, does it undertand to increase the revs in higher load (playing games) if necessary?

Well if I read correctly, only your gfx card was heating the mb, so why worry about it? Buy a decent gfx cooler and tweak it a little bit

EDIT: murobbs?

I wouldn't like to try anything which voids the warranty. I was thinking more like improving the case ventilation if it needs it.

I tryed a digital thermometer which gave 28C high at the case where 5.25 slots are and c 31C under the gfx card at the bottom of the case. Those are air temps when the case is closed.

More interestingly the gpu temps drop 2-3C to 44-45C if I keep the case open. Although it doesn't seem to affect the CPU or mobo temps. This is opposite to my old system which suffered keeping the case open. So I guess it would indicate the case ventilation could be better. I still don't know if the 45C or higher mobo temps is some sort of a risk, but I suspect it is the temperature closer to the gfx card and definately not all around.

The GFX card shouldn't be heating it up - the back of a gfx card does get a bit hot, and you could just "lay" a fan on the back of the card above the core, however the Nortbridge (which is what the "mobo temp" SHOULD be) is a little way above the graphics card. I know that when my PC is idling (P5K-E, 8800GTX) i can't "feel" the heat of the gfx card.

What is your airflow in and out of the case...?

I went buying a 1200 rev 12cm Noctua case fan. I put it to blow air in low front in the case (the only place where I can put it). There is also the default 12cm case fan blowing air out back of the case just above the gfx card. I can feel the air out, but I cannot say much about the revs as it isn't connected to the mobo (see the first post).

Now the automatic gpu fan control (nvidia control panel) seems to keep the gpu temps in 57/58C, when the revs are the default 36%. So I don't need to manually 'overrev' the gpu fan (I tryed to put it at 60% before). The case temps are now at 41C in idle after 30mins of testing. That is 1C lower than before without the extra case fan AND now even without the nvidia manual gpu fan overrevving. If I would do the gfx card manual fan control, the case temps would drop lower I guess...I need to do more testing in the evening