[Ygg2]

I'm not sure if I count, but I suspect two things. Heat dissipation and controller complexity. NVMe controller might be more computationally heavy and so they might emit more heat*.

But assuming that NVMe and SATA SSD controllers emit the same energy, it makes more sense that NVMe would be hotter.

Think about it. If you throw a ball of high heat meat would it cool faster if it was connected to a large body of water (SSD with its chasis) or a small body of water (NVMe small piece of plastic that is the NVMe)?

Another thing to check if your NVMe either has proper thermal pads placement and/or if the air from the front coolers is reaching it.

[kasabali]

> NVMe controller might be more computationally heavy

Which is ironic because NVMe was supposed to be more efficient and doing less work because it's design wasn't bound with SATA&spinning assumptions and controller doesn't need to handle pcie-SATA conversions since it's directly connected to the bus etc.