Upgraded CPU caused overheat?

I have a Compaq Presario cq60 with intel t5800 initially and i upgraded it to intel t7500 recently. ever since then the computer would shut down after couple of minutes or directly if i play heavy games like mass effect 2 with no warning like BSOD and just turned off not restarted. i have formatted the hdd and did clean install of windows 64 bit and the problem still occurs when i was installing itunes on it. i havent tried playing games yet.

I expect that it is overheating problem, but ever since i bought it, the laptop was always hotter than normal laptops but this problem never occurred. after windows clean install, for the first time i tried installing the temperature test program and i thought it was normal but after i checked on google on avg temp, i guess it really did overheat... but why only after i changed CPU?

any advice is appreciated thanks.

 

If that is idle temps they are WAY too high. Faster CPU's will tend to run hotter but that is really high. Make sure the fan for the CPU is running, that all dust etc is cleaned out and maybe even repaste the CPU with a good quality TIM...................

 

Only firefox was run and kaspersky on the background idle

When i removed the heatsink&fan when i switched cpu, the fan was dirty but i didnt have anything to clean it sadly....

What do you mean by repaste the TIM?

 

Heh, & therein lies the answer, I suspect.

Did you use any sort of thermal compound between the heatsink & CPU?

 

the heat sink needs a thermal paste to transfer heat. sometimes originally they include a pad for heat transfer but these ae limited in their efficiency.

If originally it just had a paste that you cleaned off get another good paste to replace it such as Arctic Sliver 5. If there was a pad you may need to find another pad to fill the original gap between the HS and chip. Another option may be using a thick paste such as ICD.

If you just cleaned the CPU and fan surface, or reused the original TIM, you need to redo it. That is redo the Thermal Interface Material..............

 

I didnt check when i switched it... This is new to me

When you say icd, do you mean this?

Innovation Cooling Diamond "7 Carat" Thermal Compound - 1.5 Grams - FrozenCPU.com

 

It shouldn't overheat by that much. I had a similar upgrade from T2370 to T7500. Open it again, clean-up old compound residue and re-apply thermal compound on both CPU and GPU since their both on the same heatpipe. Old compound is not reusable once you remove the heatpipe. Please make sure CPU fan is plugged back in before you assemble back your laptop. And that WD hdd running at 60C - 62C makes me think the laptop has no airflow of any kind. See if you can temporarily remove the battery when you have overheating problems and run tests. Run on AC adapter only if you can.

 

Yeah, that's the right sort of stuff (disclaimer: I don't really know anything about that specific brand/product). It helps the CPU transfer heat to the heat sink more efficiently.

If you don't have it, symptoms will include, unsurprisingly, massively high temperatures. Fortunately your processor is new enough that it shouldn't be permanently damaged, they are designed to fail safe when insufficiently cooled.

When you say this is new to you, did you look up any guides to upgrading the processor before you did it? I find it hard to believe they wouldn't have mentioned this...

It will do quite easily with no fresh thermal compound!

 

I think that GPU puts out way more heat than the T7500. But yes, I agree, without new thermal compound I don't see why would you even bother to turn on the laptop.

 

Read it again: he made a mistake through his inexperience, and simply mounted the heatsink on the new processor without applying any thermal compound. Hence the ridiculous temperatures.

Your comments about airflow, relative GPU temp, battery causing overheating etc are all perfectly true but do not apply in this situation.

 

Agreed. But the GPU is at the end of the heatpipe and CPU somewhere in between. I had a look at this model's heatsink pipe. When you remove the whole assembly. You have to re-do both not just the CPU. And most likely the GPU has a thermal pad, not just paste and you need a new thermal pad or a copper shim about the same size with the pad. Or else the GPU will just keep overheating everything else including the CPU with it.

I did not say the battery would cause overheating, read it again. I asked him to remove the battery if possible to protect it from heat.

 

Really you should do a google on instructions for this sort of thing if you don't know anything.. honestly. Taking a CPU out is like brain surgery on a computer, at least do a google before you go messing around.

 

You don't need google. It'll just lead you back to one of our forum links. You're in the right place to help you complete your project.

 

Agreed. But he went upon doing this BEFORE consulting us/google. I'm talking about checking with us/google first. He knows for next time.. but I've always asked the oracle (google) before attempting anything I know nothing about.

 

Ok heres the thing.. Th t7500 was used from another laptop which was working perfectly fine.. The laptop was upgraded to better cpu(not my laptop) so he gave me the cpu as its useless for him..

I did google through some webs but my internet was as slow as a dial up since the past few weeks so i couldnt do more research. The laptop im changing cpu on is also an underutilised one so i was ready for the consequences and learn from every mistakes i make

Will the thermal paste go away after some time? Ive never touched my gpu and the temp reached that high.. And on my old t5800 i see the paste and paste there..

@twiz so youre suggesting that i should use both thermal paste and shim pad on the gpu? How do i know that the paste or pad is in contact with the heatsink?

 

You don't want it to go away - that's what's causing you the problem!

You need to add some (because, as you point out, it's all still stuck to the processor you took out).

Some sort of thermal compound is essential to properly thermally couple the chips to the heatsink, so they can cool themselves down.

 

A T5800 shouldn't be significantly cooler than a T7500. Both are 65 nm and 35 watt dual cores. My T7500 undervolted and repasted with AS5 is 25 idle and max load doesn't go above 69 (23.5C ambient) though I have a completely different cooling system than your HP (which by the way traditionally have poor cooling system designs).

 

The heatpipe from the GPU is the same with the one from the CPU for this model laptop, I've seen it. They're placed next to each other. It means you have to re-do both. Thermal pads are not reusable, if you choose to reuse it because you really need this laptop running (your choice) at least re-apply some new compound to it. It's tight when you grab the heatsink and it doesn't swivel or you don't feel any movement between the heatsink and components.

 

If you only take one post away from this entire discussion, this should be the one:

Open up the laptop and take off the processor heatsink. Clean off the old thermal paste from the processor and the processor heatsink. Apply a thin layer of new thermal paste. Put it all back together.

You must replace the thermal paste when you change out the processor. Old, hard thermal paste wont create the processor-heatsink bond that is needed to keep the processor cool. You experienced this first hand.

Once I bought a box with a completely dissembled Dell Inspiron 1520. I forgot to put thermal paste on the processor and it hit 90C just after boot up.

 

I would not run the laptop without thermal paste applied. You risk damaging the CPU itself.

^ that is not true at all. I could be true only within the same model CPUs where the difference is only the frequency used to run the chip.

- look into undervolting the CPU once you install it correctly, this does wonders with further lowering the CPU operating temperatures

 

You do not need to touch your gpu. Grab some 99% isopropyl alcohol at you grocery store, use a cotton ball to remove the old paste completely. Put a grain of rice sized drop of thermal paste on the cpu. Put everything back together and that should be it. You shouldn't need to remove the pad that is your IGP.

 

Both 65nm, t5800 = 2.0 GHz 2 Meg L2, T7500 2.2 GHz 4 meg L2 so generically the T7500 will run hotter. Higher cache, besides frequency will generate more heat, just the nature of the beast.

Undervolting works, but having some type of TIM usually works better.................

 

see my next post

 

Actually, thats wrong.

Both processors are 65nm and have the same TDP(35 watt), which basically means they have the same heat output:

Intel® Core?2 Duo Processor T5800 (2M Cache, 2.00 GHz, 800 MHz FSB)with SPEC Code(s)SLB6E

Intel® Core?2 Duo Processor T7500 (4M Cache, 2.20 GHz, 800 MHz FSB)with SPEC Code(s)SLA3N, SLA44, SLADM, SLAF8

 

I'd put a bit more than a grain of rice amount... rice is really really small. But no more than 2 grains of rice.

OP shouldn't have to touch the paste directly or undo the clip that keeps the CPU in place.

Touching the thermal paste directly can cause burns to the skin and for gods sake don't rub that stuff on your eyes.

 

is the tuniq tx4 good enough?

 

TDP is just the MAX thermal envelope. CPU speed and cache (active transistor count) amongst other factors will determine how hot the cpu is under load. Even within the same structure (65nm) steppings and other indeterminate variables will change the outcome..............

Since though the original TDP was 35w the laptop should handle the new CPU and not overheat. This stipulates the computer manufacturer used the full envelope of the TDP in its design of said cooling system...............

 

Even without a TIM it shouldnt overheat that bad.

-Are you sure you re-installed the heatsink properly? You have to use the star method to help even out the tightness between the screws so the heatsink sits as flush as possible.

If you have no TIM and the heatsink isnt properly seated then theres your problem. Buy yourself some quality paste and apply per instructions.

-Are you sure you plugged the CPU fan back in? Its a tiny plug thats very easy to miss. Check that the fan is spinning at boot up.

 

good example would be the T7500 and the T9500 where the last have higher clock speed and cache, is faster, has ~410 mil transistors (compared to ~290 mil in T7500) and yet runs much cooler. It does that based on two main things:
1. lower VID; (<-main reason)(possible due to the 45nm process compared to 65nm)
2. improved internal power scheme (has no effect when running at 100% only)

My T7500 worked at 1.125 V at 2.2GHz (gave errors at 1.100V), and the T9500 that I'm using right now works at 1.025 V at 2.6 GHz even though it's not the best cut chip, thus much cooler due to the big difference of 0.1 Volts (yes that's quite significant for today's CPUs). Specs from Intel for the T9500 VID: 1.000 - 1.250 V

but yes, TDP specifies the maximum thermal dissipation for heatsink designs, 35W for most laptops.

T5800 VID: 1.075 - 1.175 V
T7500 VID: 1.075 - 1.250 V

if the OP has the worst cut T5800 and changes that with the best cut T7500, actual temps could and most likely will be lower with the new CPU, considering both were undervolted for maximum temperature drop His issue right now is with the thermal compound though ...

 

The fan is running so i know its plugged in and as far as i know the heatsink is installed correctly.what do you mean by star method?