B650E Steel Legend PCIe 4.0 x8 instead of x16

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   Hi. I have a question. On the B650E Steel Legend board, are the PCIe Gen5 lines for the top PCIe 5 x16 slot shared with the Blazing M.2 socket (M2_1, Key M). Currently, I have a GPU connected to PCIE1 and a bootable NVMe drive connected to the Blazing M.2 socket. For the GPU, I have PCIe 4.0 set to x8 instead of x16.

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Senac Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 22 Feb 2023 Status: Offline Points: 85	Post Options Post Reply Quote Senac Report Post Thanks(0) Quote Reply Topic: B650E Steel Legend PCIe 4.0 x8 instead of x16 Posted: 27 Feb 2023 at 5:32pm
	Hi. I have a question. On the B650E Steel Legend board, are the PCIe Gen5 lines for the top PCIe 5 x16 slot shared with the Blazing M.2 socket (M2_1, Key M). Currently, I have a GPU connected to PCIE1 and a bootable NVMe drive connected to the Blazing M.2 socket. For the GPU, I have PCIe 4.0 set to x8 instead of x16.

eccential Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 10 Oct 2022 Location: Nevada Status: Offline Points: 4300	Post Options Post Reply Quote eccential Report Post Thanks(1) Quote Reply Posted: 27 Feb 2023 at 8:01pm
	No. AM5 CPU has 28 lanes, 4 of which are used to connect to the chipset. 16 lanes to PCIe slot1 4 lanes to PCIe slot2 4 lanes to M2_1 ---------------------- 24 total And 4 more to the chipset, as mentioned already. What GPU? Some lower end GPUs only have 8 lanes, like RX-6600, RX-5500, RTX-3050, etc. But there was another thread talking about the same issue. Some fixed with reseating the CPU, another fixed with a replacement CPU. I don't remember if there was other solutions.

Senac Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 22 Feb 2023 Status: Offline Points: 85	Post Options Post Reply Quote Senac Report Post Thanks(0) Quote Reply Posted: 27 Feb 2023 at 8:15pm
	RX-6800XT. Thank you for your reply. So one possibility is already ruled out. I will try reseating the GPU and CPU.

Senac Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 22 Feb 2023 Status: Offline Points: 85	Post Options Post Reply Quote Senac Report Post Thanks(1) Quote Reply Posted: 28 Feb 2023 at 1:19am
	Looks like the problem is solved, reseating the GPU helped. It was apparently not pressed down enough before.

eccential Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 10 Oct 2022 Location: Nevada Status: Offline Points: 4300	Post Options Post Reply Quote eccential Report Post Thanks(0) Quote Reply Posted: 28 Feb 2023 at 3:45am
	Good to hear. These modern connectors are doing a lot, because the signal rate is so high. I also had a problem some months ago where cleaning the connector contacts with alcohol fixed it. I'm much more careful about not touching any exposed contacts these days.