R7 does not support bifurcation on the PCIe slots. Therefore you cannot bifurcate the slot to support 2 drives at x4 link speeds. Reason why I say 2 drives and not 4 drives, is because the PCIe slots on the R7 are mechanically X16 length, but electrically X8. There are some controllers that support 2 drives at X4, but they have their own chip onboard. The card you purchased relies on bifurcation. (Or Intel Vroc, AMD Threadripper platform)   R7 Service Manual 
Hi guys, I've recently bough a Hyper m.2 x16 card v2, an expansion card that can support up to 4 SSDs. Link: [URL] At first i only added 1 SSD into the card for use before i added a second SSD into a 2nd slot for inteded use, however no matter how hard I've searched the answers for, it does not let me partition the second SSD as my system doesnt detect it. I do not think it is a hardware problem as the expansion card had an indicator to say that the 2nd SSD is being used. The closest solution i have came across is to somehow enable bifurcation in the BIOS menu, however Alienware's BIOS menu had no such option anywhere, in fact the BIOS menu seems lacking of many options of other BIOS menus, is this true? Please give me guidance :c
Aurora R7, expansion card troubles