What is the maximum safe operating temperature of the DV7 3063cl with the 640 M CPU upgrade?

[mhscholder]

I have recently restored an HP DV7 3063cl laptop that died from an overheated motherboard (MB). I replaced the MB with a new board from HP when the price was reduced to about $100, upgraded the CPU with an advertised as new AMD 640M, and applied Arctic Silver on both the CPU and Graphics chips. I put in 4 G of fresh memory, got the computer to operate, and installed Windows 10.

The computer seems to run very hot and has shutdown twice from overheating over its first 2 week period when there was not much computing in progress, the fan was run at top speed continuously, and the laptop was elevated to allow good airflow underneath.

According to the Open Hardware Monitor program, the CPU had reached 97 - 99 C a few times. I bought a gamer's cooling stand and that appears to help a lot, dropping the temperature to around 20 C.

What is the maximum safe operating temperature of the DV7 with the 640 M CPU upgrade?

[Karthik]

#HPExpertDay

This has the info and will help:

http://support.hp.com/us-en/document/c01657439

[Huffer · Accepted solution]

Anything over 90C is too hot. Can you specify the motherboard you installed and the processor? 

Also there si this from the MANUAl:

Thermal paste is used on the processor 1 and the heat sink section 2 that services it. Thermal pads are used on the Northbridge chip 3 and Northbridge contact 4, the graphics subsystem chip 5 and graphics/heat sink contact 6. Replacement thermal material is included with all fan/heat sink assembly, system board, and processor spare part kits.

So unless you modified the cooling system to put thermal compound on the graphics chip you should have used a thermal pad. Without the pad it can leave just a tiny clearance and wreck the cooling properties. You can use a copper shim or other piece of something metal to fill in the gap but if you just put the heatsink down on the video chip you are not going to get optimal cooling even with thermal compound.