PCI Express Riser Card x8 to x16 Left Slot Adapter for 1U Servers

Calandis PCI Express Riser Card PCI-E x8 to x16 Slot Adapter x8 slot Some of those slots share PCI lanes with the PCIe slots In the one you mentioned it appears that the 3rd slot (M2C, likely means there is an super lucky reels slot if the slot is open like that, you should be good to go if it's not open, you could a) use another riser to adapt the x8 to x16, or b)

3 slot power cord X6 — ULL — X8 5 4 2 3 1 6 7 1U CP9 NP7 10GE 960GB AC DUAL TPM 6 8x GE SFP slots, 8x 10GE SFP+ slots, SPU NP7 and CP9 hardware accelerated