b650 PG lightning BIOS question

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   Hello, i have got a b650 PG lightning.

I have to upgrade the BIOS because, if i'm not mistaken, my CPU 9600x don't even start with the old BIOS.
Can i flash directly the last version? (3.50)
I ask because i tried exactly that but the result is the solid green light (if i understand right, that means something is wrong).

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Delpoz Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Dec 2025 Status: Offline Points: 30	Post Options Post Reply Quote Delpoz Report Post Thanks(0) Quote Reply Topic: b650 PG lightning BIOS question Posted: 05 Dec 2025 at 11:49pm
	Hello, i have got a b650 PG lightning. I have to upgrade the BIOS because, if i'm not mistaken, my CPU 9600x don't even start with the old BIOS. Can i flash directly the last version? (3.50) I ask because i tried exactly that but the result is the solid green light (if i understand right, that means something is wrong).

eccential Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 10 Oct 2022 Location: Nevada Status: Online Points: 6695	Post Options Post Reply Quote eccential Report Post Thanks(0) Quote Reply Posted: 7 hours 56 minutes ago at 10:36pm
	The "Flash Back" type feature becoming mandatory on AM5, there shouldn't any "bridge" BIOS requirements on any AM5 board. You don't even need a supported CPU to flash BIOS on AM5 systems, after all. If you're having issues with flash-back process, debug the process, not the BIOS version. Maybe you're using incompatible USB memory stick (e.g. too large of a capacity). Maybe you formatted it incorrectly (e.g. NTFS vs. FAT32).

Delpoz Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Dec 2025 Status: Offline Points: 30	Post Options Post Reply Quote Delpoz Report Post Thanks(0) Quote Reply Posted: 1 hour 52 minutes ago at 4:40am
	Thank you for the answer, Eccential! You were right, i tried with another stick and this time it worked! I know this seems incredibile but i assure you both had the same size and FAT32; for some reasons the mobo didn't like the first. Anyway my problem is solved; i assembled the PC and it works! A last question if i may: if, for some reasons, i have to clear the CMOS the BIOS reverts to the older version? I think not, buy i'm not so sure...