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No, it will be x8 (Gen4) or x8 (Gen3). The slot in short turns into a x8 slot if that M.2 Gen5 socket is used regardless of the type of M2 NVMe because it is stealing those PCIe lanes from the x16 slot.Thanks ir_cow. So to clarify, the graphics card drops to gen 4 x8 (like gen 3 x16, ~16GB/s)? I think I'll definitely be OK with that bandwidth.
The MSI Z690 Carbon is a bad example because it doesn't have a M.2 Gen5 socket, but the picture will help. Say a MB has two x16 slots (First two slots in photo). When they are both in use they drop to x8/x8 because its sharing the x16 coming from the CPU (regardless of Gen type). When the M.2 Gen5 socket is used (lets say above the PCIe slot), you lose the second x16 slot because that x8 is now going to the M.2 socket instead.Unclear on second slot being disabled though. Are we talking about the Intel motherboards that DO have PCI-E 5.0 M.2? Taking it away from CPU PCI-E lanes that would go to GPU normally, so using the mobo M.2 disables the second actual PCI-E x16 slot?
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Same deal, they go into that second slot, which means if a MB has both M.2 Gen5 socket and a add-on card, either you need to put it in the first slot and lose the video card or not use the M.2 socket. I don't know if they are bootable for OS, but I'm going to say, probably not.How about the PCI-E 5.0 adapter cards with M.2 slots for PCI-E 5.0 SSDs - same deal? And are these cards available for purchase yet? And bootable? Sorry. That's a lot of questions.