Black Tape on CPU - GT60

I opened up my laptop to repaste the GPU and CPU with some IC Diamond 7 compound and noticed a strip of black tape on the processor. Note that I wanted to do this repaste in the first place because temps for the processor were going into the mid 90s during gaming sessions (not even lasting more than half an hour). Does anyone know what the purpose of this is, or if I should remove it or keep it on?

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EDIT: Idle temps seem to be fine; hovering around the mid 40s. Only under load does it experience the high temperatures.

 

Remove it and repaste. Quality assembly issue.

 

Ok, removed and repasted. After about 40 minutes of Crysis my CPU maxed out at 85, GPU at 78. Do these seem like stable temps?

 

I actually had that strip as well, so have to assume they put it there intentionally I guess to cover that part of chip... having said that I removed it and all is running properly. Not sure what it was suppose to do other than keep the factory paste off that area? No idea!

 

I also have the black foil strip as well, but the factory paste job have spilled over the top of the chip, and underneath that foil strip. I removed it, cleaned the chip, repasted, and haven't had any issues.

 

85C, although safe, is a bit high for CPU. Can you run wPrime? it keeps usage @ 100% for a small while to test temperatures. GPU temps are very good

 

I just finished a 5 minute stress test for the CPU using Intel XTU, max temp was 79, that is with the 4700mq also undervolted it by 70mV which is lowering temps, and so far isn't causing any instability.

 

79 is a very fine temp, even under full stress CPU usually goes as high as 80C assuming a proper paste job was performed.

 

The tape is an extra insurance to ensure your CPU will not short circuit through the heat pipe. In normal usage, there should not be any case that the heat pipe will touch the components on the CPU, but there cannot be 100% sure unless we added this tape on there. The Tape should not increase heat on the CPU and is highly recommended to leave on there to avoid any possible short circuit related RMA.

 

I understand the reasoning. However, with that tape on, my processor's temperatures were reaching up to 99C, and only stayed there because of throttling. With the tape off, my processor rarely reaches above 80C.

 

It shouldn't cover the heatsink regardless, probably bad assembly job as mentioned.

 

Yes it looks like it moved during assembly, put it back if you want just position it carefully (not over the die ofc)