I had to change a failed motherboard for a HP Pavilion dv4 laptop. I am using the heatsink & cpu from the dead mobo.
I have applied Arctic Silver 5 to the CPU. Do I need to change the “brown pad” that sits on the GPU? Another “green” one looks like a pad/paste and sits on two blocks (capacitors?). Does that need to be changed as well?
What kind of replacements would I need and where should I look for them? HP provides pads & paste with its fan/heat sink/mobo/CPU spare parts kit but it’s very expensive.
From the HP Maintenance & Service guide:
“Each time the fan and heat sink are removed, the thermal material must be thoroughly cleaned from the surfaces of the heat sink and system board components: heat sink (1), processor (2), Northbridge clip (3), and capacitor (4). Thermal pads and thermal paste must be installed on all surfaces before the fan and heat sink are reinstalled. Thermal pads and thermal paste are included with all fan, heat sink, system board, and processor spare part kits.”
I came across your post. I just joined to reply to you!
About those thermal pads: I have a customized Dell Vostro 1320 laptop, with Intel T9600, 2.8 GHZ and Geforce 9300gs. Both have notorious reputation of heat problems! I have heavily used it for optimization problem solving and it is not rare for it to be on for 3 or 4 months (nonstop). Four years ago, only 2 or 3 months after buying it, the graphic card stopped working. I took it for service. They changed the mobo and they placed new thermal pads! I checked it with SpeedFan and the GPU's temperature was much lower this time.
Again several months ago it started to switch itself off when GPU got to 120C! So I did a comprehensive research about changing the thermal pastes and pads. You have chosen a very good thermal paste. I highly recommend you to also change the thermal pads. The best brand to my knowledge is Fujipoly available at frozen cpu! Try to measure the thickness of your current thermal pads and order new ones accordingly. Remember: the better the thermal pads are in heat transfer it is harder to compress them, so if you order a thick pad you will find difficulty screwing the heat sink back!
I've got the one with 17.0 W/mK thermal conductivity and the GPU temperature dropped from 75~95 to 50!! I am very impressed with it's performance. About those things in the picture, for me it were north bridge but I am not sure about yours. I also changed the thermal pad on them.
I used Shin-Etsu X23-7783D for the cpu. Its thermal conductivity is about 6 I guess. I wanted to use the thermal pad to see how it performs on the cpu but excessive thickness didn't let me to test it.
I checked with a guarantee service in my area and they use pads with 6.0 W/mK thermal conductivity and they are pleased with its performance. I didn't risk and bought the best one!