asrock b550 phantom gaming 4 ac

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   I have an old asrock b550 phantom gaming 4 ac motherboard and I wanted to use it for an emachine with downgrading to a Ryzen 4600G CPU.  I installed the latest (non) BIOS and when I swapped out the Ryzen 5800X for the 4600G, the CPU and DRAM lights are stuck on and RED and will not post.

Is the 4600G compatible with the motherboard.  Most updates say 50000G series support and fixes.  I'm afraid one of them has borked 4600G support or something.

Any advice on what may be the issue?

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MarkJohnson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 19 May 2020 Status: Offline Points: 187	Post Options Post Reply Quote MarkJohnson Report Post Thanks(0) Quote Reply Topic: asrock b550 phantom gaming 4 ac Posted: 04 Nov 2024 at 2:12pm
	I have an old asrock b550 phantom gaming 4 ac motherboard and I wanted to use it for an emachine with downgrading to a Ryzen 4600G CPU. I installed the latest (non) BIOS and when I swapped out the Ryzen 5800X for the 4600G, the CPU and DRAM lights are stuck on and RED and will not post. Is the 4600G compatible with the motherboard. Most updates say 50000G series support and fixes. I'm afraid one of them has borked 4600G support or something. Any advice on what may be the issue?
	AMD Ryzen 5800X B550 Phantom Gaming 4/AC 64GB Crucial 3,200MHz CL22 RAM (CT2K32G4DFD832A) Radeon 5700 XT 8GB Corsair 850 Watt RM850 PSU BitFenix Nova Mesh SE 4ARGB (Case) 4TB Crucial P3 Plus NVME

MarkJohnson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 19 May 2020 Status: Offline Points: 187	Post Options Post Reply Quote MarkJohnson Report Post Thanks(0) Quote Reply Posted: 04 Nov 2024 at 2:38pm
	I couldn't find an edit post option. So I want to add that I reinstalled my 5800X and it posts just fine (BIOS 3.40). But 4600G won't post at all.
	AMD Ryzen 5800X B550 Phantom Gaming 4/AC 64GB Crucial 3,200MHz CL22 RAM (CT2K32G4DFD832A) Radeon 5700 XT 8GB Corsair 850 Watt RM850 PSU BitFenix Nova Mesh SE 4ARGB (Case) 4TB Crucial P3 Plus NVME

MarkJohnson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 19 May 2020 Status: Offline Points: 187	Post Options Post Reply Quote MarkJohnson Report Post Thanks(0) Quote Reply Posted: 04 Nov 2024 at 2:41pm
	Also, the 4600G is listed as supported on the "CPU support list"
	AMD Ryzen 5800X B550 Phantom Gaming 4/AC 64GB Crucial 3,200MHz CL22 RAM (CT2K32G4DFD832A) Radeon 5700 XT 8GB Corsair 850 Watt RM850 PSU BitFenix Nova Mesh SE 4ARGB (Case) 4TB Crucial P3 Plus NVME

I,Darwin Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Nov 2024 Location: Ontario, Canada Status: Offline Points: 30	Post Options Post Reply Quote I,Darwin Report Post Thanks(0) Quote Reply Posted: 3 hours 46 minutes ago at 3:05am
	In my sad experience, if it ain't on the officially supported list of exact CPU models, the B550 will not boot with it. A colleague tells me that there's a hard-coded list of CPUs and their params like voltages. My experience is similar to yours - it just won't post (though, if I powered up with that unsupported CPU and without memory it would beep, so it gets part way into the POST before giving up the ghost, er, post).
	You've seen one computer, you've seen them all.

I,Darwin Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Nov 2024 Location: Ontario, Canada Status: Offline Points: 30	Post Options Post Reply Quote I,Darwin Report Post Thanks(0) Quote Reply Posted: 3 hours 45 minutes ago at 3:06am
	P.S. Mine was a B550M ProSE, but the issue probably runs pretty deep.
	You've seen one computer, you've seen them all.