Possible heat issue with SXPS 1645

I've had this since October of 2010. The SXPS 1645 that I currently own is a replacement from SXPS 1640 with it's ridiculous heat problem. Since I got the replacement, I was satisfied. But I don't know if any other 1645 owners have this problem but until recently, I was playing Black Ops and noticed my fps goes down and screeching sounds when it gets pretty hot. It usually occurs around 2hrs mark or less. I don't have any problems with MW2 or COD4. Some of the other games like Dragon Age 2, I notice fps drop because the laptop needs to work a bit harder. But I don't understand the fact that Black Ops is the only game that makes the noise and fps drop when the game runs on older COD engine. I've tried running the game with battery only, but it still persists although it kinda settles. Can someone help me?

 

Things to try :

- Clean dust (especially bottom air intake)

- Repaste CPU - easily done on this model

- Buy laptop cooler

- 99% Max CPU usage trick - will stop Turbo Boost, see http://forum.notebookreview.com/dell-xps-studio-xps/590543-xps-l502x-turbo-boost-2-0-a.html

 

What is repaste CPU?

 

Take the CPU out, clean old thermal paste off, apply new thermal paste (Arctic Silver 5 preferred) and reseat CPU.

Fortunately it's easy to get to the CPU on this model :

http://support.dell.com/support/edocs/systems/sxl1645/en/sm/cpu.htm#wp1084976

 

What exactly are your temps?

 

I assume I'd have to buy the new termal paste (Arctic Silver 5)? And to clean old thermal paste off, just use water soaked cloth or something? Is there a specific guide to do this?

I don't have a program that can tell me the temperature.

 

99% aysopropl Alcohol to clean heatsink, cpu and gpu. And mx-4 paste or Ic diamond. AS5 isn't good for first time applying

 

At which retail store can I get the mx-4 paste or Ic diamond