If you have removed the heatsink form your CPU/GPU , you must also replace the themal compound or risk overheating problems.
It is always a good idea for DIY people to have a supply on hand.
Convenient 5 Pack
Syringe design, for easy operation.
Helps disperse the heat from CPU to heatsink effectively.
Suitable for: CPU heatsink or chip. High temperature resistance.
Non-toxic, tasteless, non-corrosive.
Net weight: 1g.
Thermal conductivity: >1W/m-k.
Thermal resistance: <0.123°C-in2/W.
10% silver included.