Switched my CPU, having wierd temp problems (m1530)

So I used to have a T8785 or whatever it was, 2.0 ghz dual core, and i upgraded to a T9500 2.6 ghz.

Although ever since i installed it, on my CPUID hardware monitor the temps are wildly different per core (at core #0 is 40 and the other is 48 celcius). After awhile the fan stops running, the temps stay the same, increase a little bit perhaps 1-2 degrees (at idle), and then all of a sudden the values will shoot up to 75-80, the fan will turn on, and they will teleport right down to 50 again, and the fan will stay on for awhile again, then it will rinse and repeat.

I'm wondering if perhaps I didn't put enough thermal paste? Or perhaps when I flashed the bios it didnt go through properly? I'm a newbie at this so id appreciate some fast help before i make it asplode!!

PS: it seems to not be doing that jumping around anymore, but it reaches lower min temps then my weaker processor did (although when i opened my laptop i noticed the old cpu wasnt sitting in the slot properly at all, was nowhere near even.

 

Hmm...did you fit the heatsink on nice and tight again? It sounds like it might be loose.

Any BIOS updates available?

~Ibrahim~

 

What kind of thermal paste did you use? Did you clean off the old paste real good?

 

The old thing was some dried plastic thing and i thought i ought to keep it, but reading this i guess i did wrong. I just used the paste that came with it but theres enough to use again, and the heatsink was on as tight as it could go.

I just re-ran the bios install that i currently have (A12, the latest from dell), and im not exactly sure if its rewritting it properly since it spends about 2-3 secs on the white bios screen saying updating, then my laptop shuts down then back up again with a normal boot.

Il try to go back and clean up the heatsink again.

PS: there was another part that the heatsink had the same dried plastic stuff attached too, should i clean that and re-apply paste to it as well? (I dont know what it is underneath though)

 

You need to spread out the thermal paste like with an old credit card. Spread it out nice and even.

 

Nice, even, and thin!

Most people think gobs of it help, but it really has to be a thin layer to work properly, as it has to fill in the microscopic cracks between the processor and the heatsink. Too much and you'll actually get higher temperatures.

Preferably, one should always use new paste. I mean, you can use old paste if you have nothing else, but, if you can, see if you can grab some Arctic Silver or any other good TIM.

~Ibrahim~