If they do, I cannot find it on the listing for the PSU on their site.
Which, frankly, is the problem here, there are no general guidelines as to what sort of hardware can safely run with the new VRM module beyond "good for accelerator and large capacity HDD" (with large capacity HDDs having practically been obsoleted by low power SATA SSDs and converters).
I get it'll be far too specific to create a matrix with all accelerator and GPU options, but some guidelines would still allow buyers to be more able to consider hardware choices.
For $220 per unit, the three bullet points on their site are definitely not up to par to what is to be expected, even for a niche product like this.
I mean.. if he were to create a list.. would it really be that large?
There's only a handful of GPUs that fit the Cube.. 7000, 7200, 8500, 9000/9200. Geforce 2 MX, Geforce 3, 6200. Most are hard to find today.
CPU upgrades could be limited to single core models, (outside of custom modules created by members on here) it isn't a large list. Combine that with the virtual un-obtainium that most Sonnet/PowerLogix stuff is in 2023.
It'd require a bit of work.. but this thing would be half a page IMO. Heck, even a warning saying "any GPU that isn't a Rage 128, Radeon, GF2MX, requires active cooling".