Most TIMs range from 4 to 17 W/mK, at 0.6 that's extremely low. I thought it was 6 but I was definitely wrong. If you are using this on an interface that requires higher heat transfer performance I would use a different tape. Especially when you consider that getting something that transfers 10x more heat at 6W/mK won't be much more expensive. I gave 3 stars because otherwise it works as advertised. most of time. Overall I would not recommend. Especially if you use it to attach a heatsink to the back of the 3090 to cool the VRAM. It just doesn't conduct enough heat.