B550M steel legend a1 and a2 slots not working

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   Hello guys,

Im new to this forum and I need help.

Few months ago I have bought B550M Steel Legend. Default BIOS was 1.8. My CPU was 5600G, had one module of Kingston Fury 3600mhz  8 GB, M2 nwme 3.0, win 11, and no GPU. It was temporary build.
RAM module was inserted in b2 slot and it worked fine.

Recently I have bought Corsair Dominator Platinum 2x16 GB 3200. Same day I have sold Kingston RAM.
I have put new RAM in a2-b2 for dual channel. Both of modules light up, rgb is working but BIOS is recognizing only b2 module, not the a2.
Than I updated BIOS to recent one, 2.3 I think, and it wont even post with modules in dual channel combination.

After few days of trials I have found:
- both modules work, post and boot win fine in b1 and b2, both separately and combined
- neither modules work in a1 or a2, both separately and combined. System wont even get to BIOS post, 2 red LED lights are constantly lit for RAM and CPU.
- both modules RGB is working when they are inserted in a1 and a2, case fans are spinning and glowing, MOBO RBG also works
- Modules inserted in b1 and b2 both work, post and boot win separately and combined.
After every try I have powered down my system, pulled out the power cord, cleared CMOS
Than I have borrowed one single RAM module, Corsair vengenace 3200 mhz, and got same results. Its not working in a1 and a2, working fine in b1 and b2.

Its like a1 and a2 slots dont work.
Any ideas? 
TNX guys.

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sallocha Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jun 2022 Status: Offline Points: 20	Post Options Post Reply Quote sallocha Report Post Thanks(0) Quote Reply Topic: B550M steel legend a1 and a2 slots not working Posted: 12 Jun 2022 at 11:13pm
	Hello guys, Im new to this forum and I need help. Few months ago I have bought B550M Steel Legend. Default BIOS was 1.8. My CPU was 5600G, had one module of Kingston Fury 3600mhz 8 GB, M2 nwme 3.0, win 11, and no GPU. It was temporary build. RAM module was inserted in b2 slot and it worked fine. Recently I have bought Corsair Dominator Platinum 2x16 GB 3200. Same day I have sold Kingston RAM. I have put new RAM in a2-b2 for dual channel. Both of modules light up, rgb is working but BIOS is recognizing only b2 module, not the a2. Than I updated BIOS to recent one, 2.3 I think, and it wont even post with modules in dual channel combination. After few days of trials I have found: - both modules work, post and boot win fine in b1 and b2, both separately and combined - neither modules work in a1 or a2, both separately and combined. System wont even get to BIOS post, 2 red LED lights are constantly lit for RAM and CPU. - both modules RGB is working when they are inserted in a1 and a2, case fans are spinning and glowing, MOBO RBG also works - Modules inserted in b1 and b2 both work, post and boot win separately and combined. After every try I have powered down my system, pulled out the power cord, cleared CMOS Than I have borrowed one single RAM module, Corsair vengenace 3200 mhz, and got same results. Its not working in a1 and a2, working fine in b1 and b2. Its like a1 and a2 slots dont work. Any ideas? TNX guys.

threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 9365	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Posted: 13 Jul 2022 at 11:02pm
	Dear Sallocha, The memory controlelr is Not on the board, but integrated in the CPU, and there is a direct link, between the pins of the CPU, and the contacts in the memory slots. Please check if all CPU pins are okay. If A1 and A2 keep feiling (actually the memory should be in A2 B2 for dual channel) It is either a defective board, of a defective CPU, and you should contact your dealer, and send in both. Warranty, is always, between seller and buyer, some dealers, tell otherwise, but that is not how warranty works under EU laws
	Kind Regards

doublekassu Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 28 Jan 2025 Status: Offline Points: 75	Post Options Post Reply Quote doublekassu Report Post Thanks(0) Quote Reply Posted: 15 hours 30 minutes ago at 4:45pm
	Did you ever fix the issue?