Undervolting/Cooling Questions

I want to undervolt my CPU to increase efficiency and service life and decrease temperature, but I'm worried about something.

My GPU is overclocked - runs at a stable 86C after five-ten minutes of stress testing, and I don't want it to go any higher.

The fan's high speed kicking in is (from what I've heard and observed) purely dependant on CPU temp, so if I undervolt the CPU, the fan won't kick in as much, and I'm worried that that will cause my GPU to get even hotter.

The fan is quiet, even on high-speed, and if I can find a way I'll be setting it to run ATT when I'm playing games. (I'm currently talking it through with ASUS tech support, who said I could change fan setting in the bios, but no joy).

Does anyone have any thoughts?

Something else I was thinking of doing was hardwiring a single-pole-double-switch to that would switch the +ve power lead to the fan with a wire connected directly to the +12V battery terminal, so that I could set it to run at full speed whenever I wanted quickly and easily.

Was going to just PM FlipFire, but for some reason I can't access PM.

 

Im not sure about your computer but my fan turns on depending on either cpu or gpu temps. (usually due to GPU)

 

Have you tried any programs that control your fans? For example speedfan/nhc/whatever works on your model? Software solutions are simple and easy to change.

Also, lowering your CPU temperature might reduce the temp. of the heatsink if you can keep the fans up, lowering your GPU temperature since many put both compoenents into one larger heatsink.

 

Therein lies the problem - fan control.

If I could keep the fans up this wouldn't be an issue, but no-one has managed (that I've found) to crack the protection without manual programming, which is out of my league.

I'm just worried because my overclocking values are above everyone else's reported highest stable values for this card, and I'm running a good 10 degrees celcius lower (reported).

 

What does your GPU hit after a few hours of gaming?

 

It doesnt work like that. The fans are activated by the ACPI Thermal Zone temps, which are the chipset temps. (if you have a notebook with a single shared fan for the cpu/gpu)

The ACPI is also programmed to shut off the notebook when it reaches excessive temperatures.

If you have a notebook with 2 fans or more, 1 is usually dedicated for the CPU and the other for the GPU. The CPU/GPU temps will control these fans individually

 

Ahk, thanks, in that case I'll give undervolting a go.

._.

...

This is pretty embarrassing, but I can't tell you, I haven't played any game for a couple hours in the last two months... I'm doing an internship in the US for one of my dad's friends (geo mining company) and have been exhausted every day after work, and having bought Oblivion GOTY two weeks ago, only just got around to playing it the other night.

I just got BioShock this arvo, which should give a fair workout, I'll get to it and get back to you on that.

 

I would also be interested in hotwiring my 3 wire fan which is contolled outside ACPI and immune to every utility mentioned in these pages. What's the usual max voltage for a blower type fan in a Fujitsu A6120? What will the tach wire do if I reverse polarity to suck cool air in past the CPU first?

Thx for any tips.

 

You probably want to post that in a new thread.

Not that I mind you putting it here, but you'll have better luck I think.