M1210 Thermal pad not replaced after MoBo change- Are these temps OK?

I got a new XPS M1210 from Dell around a month ago. However, I noticed that there was a hi pitched hum coming from the MoBo that would change its pitch depending on the load on the CPU.
Turned out that the problem was with a noisy DC-DC SMPS on the motherboard, and the pitch would change with the CPU core voltage change.

Anyway, to cut a long story short, the Dell folks replaced the entire motherboard and the problem dissappeared.

However, it suddenly struck me today that when the technician had come down, I might as well have asked him to clean up the proccy and GPU and put some AS5 instead, and then it also hit me that the guy never replaced the thermal pad on the CPU or the GPU.

SO I monitored the temps for a while, and this is what I got:

CPU- T2400 Idles at 39-40C, 44-46 at moderate loads, 50-55 while running games

GPU- Go 7400 Idles at 50-55 C, goes upto 70-80 C while gaming

Are the temps OK?
WOuld it be worthwhile to open up the machine again, take off the heatsink and apply some AS5?
I wouldn't have even bothered asking if it were a desktop, but on this lappy, it will easily be a 2-3 hour job doing this whole exercise, and if I go ahead and do it, I don't want it to be a job worth nothing

 

I think you are pretty right to be concerned. I was very surprised by the service I had on my Dell X1 as well. The technician forgot to put in 1 component, put 1 component in wrong, and failed to do what i thought was obvious in replacing the heatsink. Dell uses this tape thing and the core leaves an indent inside it. If a new chip is put in I was very worried about how well the contacts are. At first it ran fine then I had ridiculous BSODs. Called dell they were really clueless. They told me a bunch of ways to fix it (reformating lol, I knew and told them that the thing would mess up before it could post). So I asked them for a heatsink and they are like it cant be this. Anyway now I am getting my mobo, ram and hard drive replaced...

p.s. The funny part was that when the thing ran on batteries it had less problems. Pretty obvious to me that it was a heat issues

 

All i have to say is holy ****, 70-80 C, that is freaking hot. Yes, you should definetely work on that. Man, that is hot enough to heat up an entire small room if its not ventilated. I would suggest having a go at the As5, 2-3 hours isn't that much time and its not really demanding work.

 

Actually nVidia GPU temps do go up quite high while gaming....
Nevertheless, I am not doing much this Saturday so might as well apply AS5 to the Proccy and the GPU, if for nothing else, then just for the sake of my peace of mind