Following cards have been verified
RCS_r2UG-A2E16-A PCIe Switch
Nvidia’a dGPU
Intel82572EI NIC
NEC uPD720200 USB3.0 card
ASUS USB3.1 card
Moschip USB2.0 card
OCZ SSD
OCZ RVD400-22280-512G-A SSD
Silicon Image Corp. 3132 SATA Controller
Intel E10G42BT X520-T2 10Gigabit NIC card
StarTech 1G NIC Card
TP-Link TG-3468 1G NIC Card
ASUS ROG AREION 10G Express 10Gbps
ASUS XG-C100C 10G NIC card
Realtech RTL8111/8168 1G NIC card
Intel CT Desktop Ethernet NIC card
Tehuti 10G Network Card
Intel Ethernet I210 – T1
Toshiba NVME card
Intel 750 Series SSDPEDMW400G4 NVMe SSD
Samsung NVME SSD
WD NVME WDS256G1X0C SSD
Plextor PX-128M8PeGN NVMe SSD
Intel SSDPEKKW512G7X1 NVME SSD
Kingston SKC1000/240G NVMe SSD
Realtek RTL8188CE NIC
Realtek RTL8822BE NIC
Broadcom 4356 WiFi Card
TPLINK N900 NIC card
Regarding the configuration, yes, that would work. (On a side note, you can have both Lane-8 and Lane-9 routed to an x2 slot and depending on your requirement, you can either use it to connect to x1 cards or x2 cards. Reason behind it is, both lane-8,9 are owned by the same controller