B550 Steel legend Won't post after Bios Updates£

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   I have a B550M Steel Legend. Started with an R7 1700 - worked great. Upgraded to a 5950x and updated the bios to benchmark the CPU. Went back to the R7 1700, and it will no longer post. Tried various Bios downgrades and still wont post. Tried an R5 2600 and that also won't post. Tried resetting CMOS as well.

If I put the 5950X back in, it works fine. 

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catalyst Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 May 2021 Status: Offline Points: 35	Post Options Post Reply Quote catalyst Report Post Thanks(0) Quote Reply Topic: B550 Steel legend Won't post after Bios Updates£ Posted: 08 Jul 2021 at 5:51am
	I have a B550M Steel Legend. Started with an R7 1700 - worked great. Upgraded to a 5950x and updated the bios to benchmark the CPU. Went back to the R7 1700, and it will no longer post. Tried various Bios downgrades and still wont post. Tried an R5 2600 and that also won't post. Tried resetting CMOS as well. If I put the 5950X back in, it works fine.

catalyst Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 May 2021 Status: Offline Points: 35	Post Options Post Reply Quote catalyst Report Post Thanks(0) Quote Reply Posted: 08 Jul 2021 at 8:03am
	also, just to clarify, the R7 1700 works fine in other boards, as does the r5. There are no bent pins on any. I tried reverting back to about 4 or 5 different BIOS' including the original launch BIOS. Nothing seems to work. Board seems to work perfectly fine with the 5950x installed.