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Faulty CPU cooling, ways to keep my CPU-multiplier locked lower?

post #1 of 9
Thread Starter 
Greetings,

for a good 4 yrs i already own a Clevo D900f ("Panther) with i7-920 and GTX280m.
though sadly when i have serviced the laptop about a month ago the solder of one of the threadings for screwing the CPU-heatsink to has come loose (NOES!) so now the heatsink does not seem to have enough pressure pushing it to the cpu to provide enough cooling.

I'm already 100% that it's the CPU, it manages to reach the Tjunc of 95C after roughly 5 minutes of 100% stress which is a state i'm frequently in due to rendering (I mainly render CGI graphics on this laptop using Cinema4D)

I've been busy to tinker a small solution since i REALLY need this laptop for when i'm not working at home and i simply can't afford a new one yet due to me still being a student and financials needed elsewhere the past few months.

I've tried various things, like adding additional cooling compound too (I've already applied AS5) to "even out" things, but it really looks like the threading that came loose means the heatsink just doesn't stay on correctly anymore.

Anyhow; i've tried some things, but through BIOS i can't change any of the settings i'd be used to on my desktops wink.gif
I tried to use software in an attempt to lower FSB,Vdd or the Multiplier, but i've simply had no luck.

Software i tried thus far;
- SetFSB
- RightMark CPU Clock
- GigaByte EasyTune6 (wouldn't even install)

I've also mailed CLEVO in hopes that a BIOS update might supply an additional feature, but i don't really have hopes to get the options im looking for in a laptops BIOS.

So, now for the real question; Do any of you know any methods so i can either lower my FSB, Vdd or Multiplier? I don't mind if the settings would be permanent (on the contrary!), i just need this fix untill i can get enough cash together for the new laptop smile.gif

Thanks for your time!
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post #2 of 9
Why not ghetto something?

Like, a passing bolt with a flat nut on the other side of the hole. Or a very flat head screw and a nut on the side where you can tighten it.
   
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post #3 of 9
Quote:
Originally Posted by annihlator View Post

I've tried various things, like adding additional cooling compound too (I've already applied AS5) to "even out" things, but it really looks like the threading that came loose means the heatsink just doesn't stay on correctly anymore.

Replace the screw with one of a slightly larger threading, or use a threadlocker?

Also, make sure you aren't adding thermal compound without completely removing the old stuff first, and don't use too much.
Quote:
Originally Posted by annihlator View Post

Do any of you know any methods so i can either lower my FSB, Vdd or Multiplier?

Capping "maximum power state" for the processor, under the advanced power options settings, to something like 50% should help.
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post #4 of 9
Thread Starter 
Adding a bolt from the other side won't work, there's simply no room (which is why i guess they soldered it to the PCB in the first place in-stead of using a part of the chassis itself.)
A larger threading won't help as it's the part that the thread should be inserted in that has broken off and the bolts use springs around their thread to keep the pressure to the heatsinks.

For a clearer illustration, look at this picture;
http://img714.imageshack.us/img714/3664/imag0032m.jpg
If you see the LGA775 socket, the part i'm supposed to insert the thread at the bottom-right of the socket has broken off (yes really, that was simply soldered to the PCB, never seen that before myself either!)

I'm still contemplating trying to glue the threading thingy back, since i surely do NOT dare to start soldering so close to my socket.

Will try the throttling option at least, thanks!
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post #5 of 9
Thread Starter 
Adding a bolt from the other side won't work, there's simply no room (which is why i guess they soldered it to the PCB in the first place in-stead of using a part of the chassis itself.)
A larger threading won't help as it's the part that the thread should be inserted in that has broken off and the bolts use springs around their thread to keep the pressure to the heatsinks.

For a clearer illustration, look at this picture;
http://img714.imageshack.us/img714/3664/imag0032m.jpg
If you see the LGA775 socket, the part i'm supposed to insert the thread at the bottom-right of the socket has broken off (yes really, that was simply soldered to the PCB, never seen that before myself either!)

I'm still contemplating trying to glue the threading thingy back, since i surely do NOT dare to start soldering so close to my socket.

Will try the throttling option at least, thanks!
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post #6 of 9
That's not a 775 socket. The i7-920 used the 1366 socket. Also, have you considered that the fans might be dying? Either that or you did a poor repasting job. However I'd put my money on the fans being faulty. :/
     
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post #7 of 9
Thread Starter 
Ah correct, it's not 775. I must have been confused with my old q6600, haha.

I considered that the fans may be dying, but when checking that is when i discovered the state of my block, it's simply not sitting straight on the cpu and i don't dare leaving bolts halfway tightened since it's a laptop (one of the screws is BOUND to slowly go loose then.) thus lowering the pressure on just the bolt opposing the now missing one is the most i dared to do in trying to counter the uneven pressure.
It's also clearly visible when removing the heatsink to inspect how the paste had divided, the bottom-right corner of the cpu has significantly more paste then the other parts, the top-left part even has the heatsink itself visible.

Just for double-checking i had removed all the fans and manually measured them by attaching them to a DC-source, applying their normal 12v source and having an old I/O-unit count the pulses for capturing RPM. All fans have measured 3500rpm (+/- 2% in the worst case) at 12v, which seems to a normal value to me.

I've tried asking some persons about wether it'd be possible to re-do the solderwork, but only one person dared comment on it that it's likely "hard-soldered" which would require a temperature of roughly 500C to re-do the soldering. I seriously doubt that wouldn't harm my PCB though frown.gif
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post #8 of 9
Quote:
Originally Posted by Imglidinhere View Post

That's not a 775 socket. The i7-920 used the 1366 socket. Also, have you considered that the fans might be dying? Either that or you did a poor repasting job. However I'd put my money on the fans being faulty. :/

My school-laptop (4330s) was missing one screw on the cpu-cooler, and the temps always around 100c, not to mention the cpu downclocked itself to about 1300mhz (i3-2330m). Delivered it to the IT-guy, and when I got it back, temps never exceeded 65c.
post #9 of 9
If all else fails, you can just buy another CPU heatsink for that laptop model. Fleabay sells them en masse, so it's not hard to grab another one.

It's more than possible that the HSF has literally 'burnt out'. It happened to mine. No matter how many repastes I did, temps would always soar. Once I changed the heatsink, temps dropped a solid 15*C and I could actually overclock the damned thing. tongue.gif
     
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