Good quality thermal compound for heatsinks, LEDs. IC etc. This works for CPU and GPU but I would be concerned about conductivity/capacitance if excessive application gets to the board. It's better to use something like Arctic Silver Ceramique for supercritical or sensitive components. Otherwise. This paste works great. Very easy to use. Very economical. Seems great on some ultra high power clutches at the moment. So far I've pushed 300W+ through 40mm x 240mm vias with no problems. I'll write back in a few months if this doesn't hold up.