{"id":567,"date":"2026-08-17T10:37:40","date_gmt":"2026-08-17T10:37:40","guid":{"rendered":"https:\/\/bulkdevices.com\/blog\/?p=567"},"modified":"2026-09-29T15:56:31","modified_gmt":"2026-09-29T15:56:31","slug":"how-long-does-thermal-paste-last","status":"publish","type":"post","link":"https:\/\/bulkdevices.com\/blog\/how-long-does-thermal-paste-last\/","title":{"rendered":"How Long Does Thermal Paste Last?"},"content":{"rendered":"

A CPU or GPU heatsink, no matter how flat it looks, has small microscopic spaces<\/a> between the heatsink and the CPU\/GPU. Metal surfaces are not necessarily smooth, and the gaps trap air. Air is a bad conductor of heat; it’s a very thin insulator in the spot you don’t want it.<\/span><\/p>\n

Thermal paste <\/b>is used to fill those gaps and provides a leveling surface for heat to flow from the chip to the cooler. If it is not applied, or is used up and dried, it will cause the heat to remain nearer the processor and not dissipate properly.<\/span><\/p>\n

That is why temperatures gradually increase with the age of paste. So it’s not the CPU slowing down – it’s the contact between the CPU and the cooler that is deteriorating. Imagine a bridge, but it has cracks in it. The heat still has to cross the bridge, but not as efficiently.<\/span><\/p>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t
Component<\/th>Role<\/th>\n<\/tr>\n<\/thead>\n
CPU\/GPU die<\/td>Generates heat<\/td>\n<\/tr>\n
Thermal paste<\/td>Fills microscopic gaps, transfers heat<\/td>\n<\/tr>\n
Heatsink\/cooler<\/td>Absorbs and disperses heat<\/td>\n<\/tr>\n
Fans\/liquid loop<\/td>Removes heat from the system<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n
\n
\n

Table of Contents<\/p>\nToggle<\/span><\/path><\/svg><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n