Should I change thermal compound GPU

On the P-7811FX, is there any benefit to changing the thermal paste on the video GPU. I'm using IC Diamond 24 on the CPU.
How do I access the GPU chip? Not sure from looking at the dis-assembly quide?

Also, read this in the sticky:
NOTE: If you are not planning on replacing the TIM Pad on the North Bridge at this time with either a copper shim, another Pad (really hard to find), or some really thick TIM (I replaced mine with ICD7 and it’s working great) then be very careful removing the HS – you do not want to tear, touch or get anything on the existing TIM Pad. Do not for any reason think that you can replace it with any TIM like AS5 because there is quite a large gap between the HS and the NB chip.

What is the TIM Pad and what is the North Bridge? Can you point it out in a photo.

 

TIM = thermal interface material.

TIM pad = the blue squishy square that sits over the northbridge to bridge the air gap between chipset and heatsink.

Given that you've already used ICD7 on the CPU, I'm assuming you must have removed the heatsink to perform such a task. THe northbridge somewhat resembles the CPU in terms of looks and is situated @ 4'o clock relative to the CPU. Basically, it's the other bit that your heatsink (note the position of 2x silver blocks with cooling fins/pins and the copper heatpipe joining between them; 1 is for the CPU, the other is for the northbridge) comes into contact with.

 

The NB is the chip-looking thingy that's next to the CPU. I think changing the tim on the GPU will ield good results, but the issue is you have to practically disassemble the whole laptop to get to it. I like to take my stuff apart just to see how they tick, so it might be a fun project. Wasn't hard by any means, I've done much worse.