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m6805 CPU temp? Or any other heat sensor... aftermarket..?

post #1 of 9
3/7/08 at 4:06pm
Thread Starter 
Hello! I have an eMachines m6805 that's built like a tank and has been running great for me despite the abuse it's been put through

However, over the last few years, it's seemed to be getting hotter than it did when I first got it. I usually use a board or something to set it on my lap so I don't have it directly on me anymore...

Anyway, I just had it apart today to replace the thermal grease on the CPU (it looked kinda dried up last time I looked) to see if that would help it any. The only problem is, I don't have any way to tell what temp it's at other than feeling it thru the case...

Soooo.. I've been searching around and found out that there doesn't seem to be a temp sensor accessible in these laptops

However, in an old thread that I found, someone had mentioned installing "some sort of aftermarket sensor". Well, I've had this laptop apart more times now than I can count, so taking it apart again isn't a big deal... Question I have is ... where can I get one of these sensors, and how much do they cost? If I can pick something up relatively cheap, I may look into doing something like that...

For now the machine is still running great though, not shutting down or anything so it's not "neccessary"... Just if I can pick something up fairly cheap it might be nice to do so I can keep an eye on things.

thanx!!
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post #2 of 9
3/7/08 at 7:35pm
if u digged & browsed enough posts in this forum, u would have picked up great inputs as how to keep this "beast" going and going. Just naming a few "great" ideas from the forum:
. RMClock - well researched guide & how to set up specific settings to keep it cool
. thin copper sheet
. & more

w/o playing with "sensor" and taking a chance of blowing the mobo to pieces

welcome to the forum and keep reading -

cheers ...
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post #3 of 9
3/8/08 at 1:25pm
Thread Starter 
Quote:
Originally Posted by qhn View Post
if u digged & browsed enough posts in this forum, u would have picked up great inputs as how to keep this "beast" going and going. Just naming a few "great" ideas from the forum:
. RMClock - well researched guide & how to set up specific settings to keep it cool
. thin copper sheet
. & more
Hmmm... well, I searched for RMClock after reading your post... seems to be a way to regulate the CPU speed? I'm not really interested in throttling down the CPU to keep it cooler. I'd rather have it run full speed and hot

See, mine isn't shutting down from overheating or anything... it just seems a little warm. Especially to put on my lap Next on my list of things to do is to get some canned air and blow out the air vents / radiators... just re-did the thermal grease, so that's the next step...

What's the normal temp for these things anyway? I found the HDD temp sensor, so that's at least some sort of temp I can check on... what's the normal operating temp for that if anyone knows?


thx!
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post #4 of 9
3/8/08 at 3:09pm
http://www.notebookforums.com/showth...ght=m6805+temp

the thread will give u a good ideas of m68xx temp, collected and input from many m68xx forum users

cheers ...
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post #5 of 9
3/8/08 at 11:21pm
Thread Starter 
Quote:
Originally Posted by qhn View Post
http://www.notebookforums.com/showth...ght=m6805+temp

the thread will give u a good ideas of m68xx temp, collected and input from many m68xx forum users

cheers ...
Thanx! That thread had some very useful info, didn't find it before when I had searched, thx!

Wow, ummm... CoreTemp says I'm running around 85-101 C!!! ummm... I'm not experiencing any random shutdowns or anything though...

Definately too hot though if that's accurate... Been hot for a while too... like I said, using it on a board for some time.

Guess I really need to look into blowing out the heatsink vents... I've had it apart and blown things out, but haven't had canned air available to blow thru those small vents so far. Guess that's my next thing to do (since the new thermal paste doesn't seem to have done much of anything)

thx!
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post #6 of 9
3/11/08 at 11:06pm
Take that core temp reading with a grain of salt. I've run it on mine and it was in the low eighties right after coming out of hibernate!
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post #7 of 9
3/12/08 at 12:30pm
Thread Starter 
Quote:
Originally Posted by olyteddy View Post
Take that core temp reading with a grain of salt. I've run it on mine and it was in the low eighties right after coming out of hibernate!
Yah, after running for a little while mine always runs 100+...
been like that for a while though, and no shutdowns... soooo.... still gotta blow out those air vents though... under the weather right now though so not doing a whole lot of anything at the moment.... getting up and moving is hard enough

thx for the input!
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post #8 of 9
3/15/08 at 3:57pm
Thread Starter 
I have also noticed (since monitoring stuff w/RMClock) that my 'puter seems to clock itself down every so often when i stays real warm. It'll get up to 105+ for a while, and then every so often it'll clock down to 800Mhz for a minute or so until the temp drops down to 95ish or so and then it clocks back up. (and heats back up too )

So it appears to be at least sensing the heat, so that's good Still haven't gotten canned air yet, just thought I'd update the thread on this new thing I noticed.

I'll update more "as the story develops" so to speak :P
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post #9 of 9
3/15/08 at 5:30pm
It's widely known that not all Clawhammer CPUs report temperature eith the same offset. So for example real 50°C is reported by one Clawhammwer, while another might tell RM Clock that it is on 37°C, lets say, when it is actually 50° hot.
Newarks are relatively spot on with their readings. How can you tell which offset your CPU uses? Very simple.
Use HDTune, or any other SMART tool which is capable of reading out the harddisk's temp along with RMClock.
Then put your notebook into standby or hibernate and let the components cool down and wake up the machine. The readings of RM Clock and HDTune now should be very much the same. If they are not you got your offset from the real value. Let's say HD shows 25° and CPU 42°C you know that CPU value is interpreted as 17°C above real value.
On my Visionary811, which I kinda dont own anymore (my sister got it), I found that the fans kick in spot on at 50°C until temp falls back to 40° the fans turn off. Fan level 2 is reached at 60 ° and thats about the hottest my machine ever got at stock voltages. So theres another hint as to whether you temps are read out correctly. Key to low temps is good thermal grease, which you should reapply when temps are too high and clean fan grills, of course. To clean them thoroughly you should disassemble the comp and blow the lint out...
Hope I could shed some light here.

cheers...


Addition: Best thermal compound imo is Coollaboratory Liquid Pro (beware its elecrically conductive, so only for Pros :-) . I dunno if you can get it easily in the states, but do google it, you might want to learn more about it. It beats Arctic Silver by an addiotional drop of around 4-5°C....


And finally: The temperature readout offset in RM Clock can be defined in the Advanced Tweaks regfile in this way that your readout matches the actual temperature.
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