Definitely need heatsinks then, at least for my setup. I suppose a 3rd party heatsink for an Optane 905P would work? Those Optanes are 110mm and get hot, and I've seen heatsinks for those.
Are some disks writable and have you swapped out the other disks on that PCIe card to see if its the card itself? I'd be curious if connected directly to the mobo if they all work or if some are actually dead, dead.
It was only a matter of time. There's also a string about them, by @altmind , in the Hard Drives and Solid State Drives sub-forum from earlier this week.Dangit...was hoping these stayed low key until I got a little more disposable income.
I recall reading (but can't seem to find the link..sorry) the the High Endurance (1.6TB) and High Performance (1.92TB) are functionally identical. The High Endurance's firmware is set for more overprovisioning (hence lower capacity), and the High Performance is clocked faster (hence more heat). So, in theory at least, the High Endurance model should run cooler and require less heatsink/air flow if that's important to anyones use case.
It gets really hot, even with the heatsink. I wouldn't run it without one, even with extreme airflow. It seems odd that only using an extra 320GB for over provisioning would give it 5x the write endurance though, I would suspect the chip has a much stricter algorithm for writing the data efficiently?
From the comments above it seems that the 1.6TB variant runs cooler/slower as well so that might be calculated into the endurance estimations