Starting with the 11th generation servers all memory controllers are now on the CPUs. Earlier generation AMDs already had the memory controller built into the CPU, but Intel did not adopt this design until our 11th generation servers. This is why you cannot use all of your memory banks if you do not have all of the processor slots fully populated.
In your situation what happened is that you moved the CPU from slot 1 that controls the memory for the A lane. In doing so you shut off all of the memory on the A lane. When you moved the CPU back to the A lane it re-enabled that memory, but you are now getting errors on it. If DIMM A1 were disabled you would not see anything on the screen. The system cannot POST without A1, so we know that the error you are receiving is not active.
The error will likely keep popping up until you choose the option to acknowledge the changes. The error should say something like press F2 to enter the BIOS and check the configuration. If you enter the BIOS(F2) and save/exit it should stop the POST error. You may also need to clear your hardware/ESM/BMC log via CTL E to remove LCD erorrs and stop OpenManage from reporting the error.
Yes, you can populate all slots on the A lane. There are some restrictions based on the type of memory you are using, but in general yes you can use all of the A lane slots with 1 CPU, but none of the B lane.
Daniel My
10 Elder
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6.2K Posts
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August 17th, 2012 16:00
Hello again dookooo
Starting with the 11th generation servers all memory controllers are now on the CPUs. Earlier generation AMDs already had the memory controller built into the CPU, but Intel did not adopt this design until our 11th generation servers. This is why you cannot use all of your memory banks if you do not have all of the processor slots fully populated.
In your situation what happened is that you moved the CPU from slot 1 that controls the memory for the A lane. In doing so you shut off all of the memory on the A lane. When you moved the CPU back to the A lane it re-enabled that memory, but you are now getting errors on it. If DIMM A1 were disabled you would not see anything on the screen. The system cannot POST without A1, so we know that the error you are receiving is not active.
The error will likely keep popping up until you choose the option to acknowledge the changes. The error should say something like press F2 to enter the BIOS and check the configuration. If you enter the BIOS(F2) and save/exit it should stop the POST error. You may also need to clear your hardware/ESM/BMC log via CTL E to remove LCD erorrs and stop OpenManage from reporting the error.
Thanks
dookooo
12 Posts
0
August 17th, 2012 16:00
so can i populate all the 4 dimms that belongs to processor A again or it will be just disabled forever ?
dookooo
12 Posts
0
August 17th, 2012 16:00
but when i populate all 4 dimms the bios tell me that 2 dimms are disabled ??? ... sorry but i am newbie to this .. excuse my ignorance
thanks
Daniel My
10 Elder
•
6.2K Posts
0
August 17th, 2012 16:00
Yes, you can populate all slots on the A lane. There are some restrictions based on the type of memory you are using, but in general yes you can use all of the A lane slots with 1 CPU, but none of the B lane.
Daniel My
10 Elder
•
6.2K Posts
0
August 17th, 2012 17:00
Please let me know the part number, model number, or specifications of the memory you are inserting.