pcie x16 graphics card in x8 slot - MaxSun Arc B580 stows two M.2 SSD slots to use all PCIe lanes winner 888 slot

Maxsun makes a GPU with two built-in M.2 SSD ports — Intel Arc B580 graphics card leverages unused PCIe lanes on the PCIe x16 slot.

HP Z400 Manual Online: Choosing An Expansion Card Slot. Whenever possible, use the following tips to help you select the proper slot for an expansion card: Insert the primary graphics card in a PCIe x16 slot intended for graphics. Insert a second graphics card in a second PCIe x16...

- 1 x PCIe 5.0 x16 slot with Q-Release Slim (supports x16 or x8 modes). - 1 x PCIe 5.0 x16 slot with Q-Rlease Slim (supports PCIe 4.0 x8 or x4 mode). - 1 x PCIe ...