Does GPU re-heat solve overheating problem or worsen it?

Exodias3219

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Hello! I'm planning to take my Gigabyte GTX 560 to a technician that does reheating through an infrared machine. My gpu's load temperature goes through 100C and idle load of 50-60C. The service fee is only 6$(300PHP).I haven't experienced any crashes or bsod. I want to extend the lifespan of gpu so I'm planning to avail the service. Since I already tried cleaning the heatsink and fan replacing thermal paste. I'm worried that the process might worsen the overheating problem. Any advices would be appreciated. Thanks!

PS
Dota 2 : 100C
Gigantic: 80-90C
Payday 2: 100C
 
Solution
Reheating is a short term solution, when there are micro-cracks between chips and pcb.
You absolutely do not need that.

100C under load is too high. Are fans working properly? They might be dead, then you need to replace them.
Increase airflow inside your case or get a better case.
Reheating is a short term solution, when there are micro-cracks between chips and pcb.
You absolutely do not need that.

100C under load is too high. Are fans working properly? They might be dead, then you need to replace them.
Increase airflow inside your case or get a better case.
 
Solution

Exodias3219

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I'm worried if I let the card run at 100C while playing will significantly reduce its lifespan. Fans are working properly and I already set an agressive fan curve
 

Exodias3219

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I already replaced the die thermal paste I did the pea technique with Deepcool Z5. I didn't replace the thermal pad for the vrms.
 

Exodias3219

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I can barely touch the heatpipes. Room temperature is around 30-33C I live in the Philippines. I'm very worried if the card continues to get to 100C. The following are my temp in load

Google Chrome 55-65C
Dota 2 Stable at 100C
Payday2 Stable at 100C
Gigantic 70-85

Idle load 40-50C
 

Exodias3219

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I don't want to downclock though. Max Temp is now 98C because its raining for about 2 weeks on my place so the ambient temp is slightly cooler. Completely Idle temp is around 40-48. While Downloading or opening a browser(google chrome) temp is around 55-68C and while running games directly rose to 98C.