Precision M6800 Fan Control?

Hy,

I was wondering if there is any way to control fan (override default behaviour). Sometimes on high load the temperature rises, the CPU goes a bit down (85°C and 3.2 GHz) and the fans also throttle down a bit.
There are occasions where I need the most of those fans, not for them to go down despite the high temperature...

I tried several Fan Speed software, but some can't be installed (need signed drivers), others can't detect any fan to control... maybe there is something that i couldn't find yet.

Thank you in advance.

 

First, have you ever repasted? If no take a look here in the forum for Liquid Ultra or standard compound.

2nd- Throttlestop 8.40 from unclewebb and limit your multi or other.

3rd- Hwinfo32 last version with EC support checked (but look at sensor anyway!)

Regards!

 

I did not, indeed. I have the machine for more than one year, but I didn't change the paste on the processors yet. I've been doing only dusting periodically. Thank you for the good advice.
By the way, I see this machine has the heatsink under the keyboard... do you know by chance any (youtube) example to easy guide for disassembling to access the heatsink, or the Dell Manual is as good as can be?

Thanks for the quick reply.

 

What's wrong with the Dell manual? The procedure was rather simple on the M6700 compared to the older models (e.g. M6400).

 

Just ran Throttlestop 8.40
findings for throttling:
-CPU jumps to 58.6W (from nominal 46W) for a short while
-Temperature reaches critical
also see attached:

 

Nothing wrong with the manual. I was just asking ... as a personal preference, i find it easier to see someone doing (eg. video). That's it. I have the manual and I got the link too. Thanks.

( http://www.dell.com/support/manuals...14A311-8A1F-4FB1-B59D-701BD5E0D605&lang=en-us )

 

Have you used Liquid Ultra? I heard is a bit corrosive (eg clearing cpu etching - i don't know if it does more). If you used it, was it in a notebook/laptop?
How does it behave compared with classic compounds (eg. Arctic).

Thanks.

 

You can install "Dell Power Manager" (from the Dell support site), the tool lets you select between four performance/fan profiles. Setting it to "cool" will ramp up the fans and slow down the CPU speed to keep your CPU cool, while setting it to "High performance" will also ramp up the fans and let the CPU run at max speed.

 

It is already on Ultra Performance. Thanks. I mostly use it "hardcore" as I am doing 3D design and rendering (yup, here is's exploited). Sometimes it renders even 12hrs.
I am aware a workstation would be best, but there are reasons why I have to torture a notebook for such jobs. I just have to make sure it holds the stress.

 

The Core i7-4900MQ has a TDP rating of 47W. Long term, the CPU will throttle so power consumption does not exceed this value. For short bursts, Intel recommends that manufacturers set the power limit to 25% greater than the TDP limit. This means PL2 should be set to approximately 47W X 1.25 = 58.75W. It can usually run at this higher limit for up to 28 seconds but the amount of time available varies based on how hard you are trying to push it. If you are running something like Prime95 with the AVX instructions, it will not be able to run at PL2 for very long before it has to throttle down to the PL1 limit.

The sad part is that even if you improve your cooling, you are still going to be held back by these power limits. Your cooling system looks like it is adequate to run at the 47W limit.