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Lapped CPU and INCREASED temperature!

Tags:
  • CPUs
  • Heatsinks
  • Temperature
  • Overclocking
Last response: in Overclocking
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April 3, 2008 3:32:13 PM

I installed a new PSU while installing I had to take the heatsink off. I cleaned it and applied AS5. The temperature I was getting was 46C idle and 68C load. My normal temp is 40C idle and 61C load. I repeated this twice and still no change in temp so I used MX2 and that was roughly the same temp.

My heatsink is already lapped, so I decided to lap the CPU. The temp went down to 45C idle & 66C load and this is still higher than my old temps. Also Im getting these temps with the side panel off.

Need some advise


E4400 2.66ghz OC
Arctic Cooling Pro 7
2GB RAM
8800GT 512MB

More about : lapped cpu increased temperature

April 3, 2008 7:51:48 PM

Only advice I can give is check to make sure its seated properly. A good test is just take your finger and rub a small layer of arctic silver on just the processor, till it has a thin layer, and then mount your heat sink, give it a few lil twists and pushes, then secure it.

Fire it up, boot into windows and check yer temps, and if they are still the bad temps, remove the heatsink carefully, without dragging it across the processor or anything, just lift straight up.

Then take a peek at the layering of the arctic silver. Did it disperse good? Was it evenly spread on the heatsink showing that it was properly touching the IHS of your processor?

I just lapped a new q6600 and the new ones are different than the old ones, as it has a small metal support rod going through one side of the IHS to keep it on. Very easy to see now, because its a nickel plug. So the rest turns copper, and that stays silvery.

But in the process, I noticed that one half wouldnt file down properly... it was raised up that much where I had to work to even it out! So be sure its FLAT! (You can also apply a lil thermal paste to the processor again and get a clear piece of glass and just stick it on there, while looking through the glass to make sure it is spread evenly!) Same applies to the heat sink!

Good Luck! I have lapped for far 4 quads, 3 heat sinks, and one water cooler, lol!

--Lupi
April 4, 2008 1:32:53 AM

Sometimes, tightening the cooler on too much will increase temps, so release it a bit. See if that works.
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April 4, 2008 9:08:36 AM

Last night I lapped the CPU and heatsink again, applied the AS5 and used a bolt-thru-kit. Put it all together and still the temperature is way too high. I'm gonna lossen the bolts tonight and see what happenns.
One of the heatsinks on the mother board is really hot, could this cause a problem?

This all happen when I installed my 8800gt and a Corsair HX520w.
April 4, 2008 5:17:21 PM

It may not be your HSF at all. If the new GPU and PSU increased the ambient temperature in your case and you have bad air flow through the case, your core temps will go up.

Do your core temps change much when you remove the case cover? If they do, you need better air flow in your case.
April 4, 2008 9:34:31 PM

I have noticed that the orientation of some HSFs will cause very poor performance. Try turning it a 1/4 or 1/2 turn to see if it makes a difference.

Also, after lapping, I have noticed that I need MUCH less AS5 than I did before. It takes a lot less thermal grease to be too much on a lapped/smooth surface.

April 5, 2008 12:47:36 PM

I have kept the cover off, as it get really hot... almost reaching 70C.

Could the PSU be sending a higher voltage to CPU and motherboard?
April 5, 2008 1:56:23 PM

dudley118 said:
I have kept the cover off, as it get really hot... almost reaching 70C.

Could the PSU be sending a higher voltage to CPU and motherboard?



That shouldn't happen. You can check voltages across different rails in BIOS. There are windows programs, but the original system monitor readings in bios are more reliable.
April 5, 2008 2:03:06 PM

the motherboard only take in what it needs to and will not accept excess amount of voltage pumping through when its not meant to.
April 5, 2008 2:04:35 PM

iluvgillgill said:
the motherboard only take in what it needs to and will not accept excess amount of voltage pumping through when its not meant to.



Increased voltage? You mean increase power consumption/amps?
April 5, 2008 2:13:48 PM

dagger said:
That shouldn't happen. You can check voltages across different rails in BIOS. There are windows programs, but the original system monitor readings in bios are more reliable.


didnt you follow the reply 2 above me he asked could it be the PSU supplying extra voltage.i just reply to that.
April 5, 2008 2:54:24 PM

iluvgillgill said:
didnt you follow the reply 2 above me he asked could it be the PSU supplying extra voltage.i just reply to that.



I thought the motherboard has to take whatever voltage it's been fed by the powersupply? How can it not? What can it do to control the psu?
April 5, 2008 3:33:28 PM

well personally i have never heard of over feeding of power to the mobo.but the mobo has various regulator and protection mechanism to make sure is running NORMAL.different line have different voltages.

or unless you plug the wrong plug!lol
!