That is too bad regarding Kingston's lack of confidence. That is not to say that the proposed UV400 SSD will not work, but rather Kingston does not seem to want to pick up the responsibility for it in the MCP macs.
Yes, that is disppointing to hear from Kingston. Crucial does go out on a limb and states MX300 compatibility with these older Minis.
Mini 2009 and 2010 differs, also in the SATA controller, the first has MCP79, the other MCP89.
This is likely the reason, why my 2010 mini does not negotiate 3Gb/s
Good point. I had thought, though, UV400 compatibility would be the same with either MCP79 or MCP89. A little surprised one is different enough from the other in this case.
Also interesting to see in a previous post that Samsung 840 Pro runs at 3Gbps in a 2010 Mini. Really turning into a hit or miss crapshoot.