Some low-temp solders melt as low as 140C, but typical SAC lead-free solders you'll find in laptop motherboards melt at 220C. Many laptops are fine if a process

Some low-temp solders melt as low as 140C, but typical SAC lead-free solders you'll find in laptop motherboards melt at 220C. Many laptops are fine if a processor core hits 100C. I've got an old Thinkpad with an i7-3920mx that regularly runs at 95C when running a few VMs and is certified by Intel up to 105C. And yes, I've tried replacing the thermal paste and increasing fan speeds to try to keep temperatures down, because not all processors are successful there, but it has been running like that with no issues for years.