Unfortunately it is unlikely that we’ll get any testing done in the near future with SM961 in the V.
But fortunately it looks like the SM961 heats relatively slowly up to about 50℃ and only when the stress is continuous. The normal - even heavy - use may not heat up the SM961 in any significant sense.
The below Tom’s Hardware review for the SM961 1TB is over a year old and it is very likely that the SM961 firmware has evolved and matured since then significantly.
I quote from the review (page 2): "Most SSDs, including many consumer 2.5-inch SATA products, will throttle during prolonged write workloads. During normal desktop use, the random data comes in short bursts that do not trigger throttling, or the effect goes unnoticed. Some of the early PCIe SSDs were prone to throttle issues while transferring large sequential files in rapid succession. Many of the user complaints about thermal throttling are triggered by running intense benchmarks rather than real world use.
We attempted to force throttle conditions to determine the temperature threshold where the SM961 would begin to restrict performance. This test also allows us to determine just how much the SSD would restrict performance to reduce temperatures. The SM961 never surpassed 50℃ in Crystal Disk Info, and we could only reach that temperature under a very heavy workload of 340,000 IOPS. It took several minutes for the temperature to increase from an idle of 22℃ up to 50℃. The SM961 plateaued at 50C and its temperature did not climb any higher."
Obviously this isn’t a definite answer to any thermal issues, but at least this review gives some confidence that the SM961 doesn’t suffer from extensive thermal issues.
And it looks like that it is also a stonking good SSD with firmware CXA7200Q or later.