It was approx. three years ago when I bought a "standard" Vroc key for €20.-, because, for whatever reason, the "Intel only" Vroc key was >€100.-, at least here in Europe.
So I can confirm, that the standard key is working 100% with a R6A, no problem at all with x299 boards.
Further on, I can confirm that 4x 512Gb Lenovo drives which I bought for $50.- each, also three years ago, do work on a Hyper card in bootable Vroc raid0 with a "standard" key. BUT ATTENTION: those "Lenovo labeled" drives are in fact Intel origin 7600p Data Canter (DC) drives. Please have a look at my PC specification details for more info. For comparison, I did a quick bench test: