Upgraded thermal paste causing heat issues???

[azneinstein]

Hey guys,
so I swapped out my T6500 to a T9550 in a Dell Studio 1555.

I've swapped quite a few CPUs in Laptops and have always used good paste- it has always dropped temps or lessen the fan spinning. I've always either used AS, Zalman paint one, or in this case- ShinEtsu and I only apply the recommended rice size.

This however, is the first time I'm experiencing a large amount of additional heat.

- CPU's are the same TDP/wattage, and numerous people have done this swap.

- the Heatsink covered the CPU, GPU, and two "chipsets": they originally had thermal pads, I replaced them all with the Shin-etsu

Idea for the cause or problem?

 

[pelo]

It could be loose fitting. Have you checked, double checked and triple checked the thermal pads and HSF placement? It could also be that there was a bit too much paste? It sounds like you should open it back up again and see what's going on.

 

[HaX]

if you go from thermal pads to paste gotta make sure the heatsink can reach the chips, as thermal pads are thicker

 

[shoota]

if you go from thermal pads to paste gotta make sure the heatsink can reach the chips, as thermal pads are thicker

This.
TIM needs a good amount of pressure, simply touching won't do.