0d error

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   It only works using channel A, that means there is a good chance channel B on your
memory controller is either completely dead or can't handle your particular RAM 
kit (in which case it is defective). 

As I said before the IMC on the CPU has 2 channels, A and B. If one is working then
using that channel would result in a stable and fully usable system. 

You can try checking your CPU for any missing or bent over pins, that can also
result in a channel dropping out but it's unlikely. The odds of a single pin
being perfectly bent in such a way that the CPU still fits in the socket is low.

The way the system RAM operates faster is by using 2 channels to the CPU. 2 channels
means double the bandwidth to and from the CPU and RAM. A single channel working
means the system still works but the performance takes a hit. Dual Channel vs
Single Channel performance. The system is behaving as if you only have 1 stick
of RAM installed because both are being accessed through a single channel rather
than split between 2. Basically the connection between the CPU and any RAM you
install in channel B is cut and given it's broken inside the CPU itself there is
no way to fix it. The CPU can still see and use RAM in channel A however so the
system continues to function normally given the RAM channels function independently 
of one another. Like pulling a spark plug lead off a 2 cylinder engine while it's
running, you lose some power but the engine will continue to run. In the case of
a CPU however it won't damage the system to do so, you just lose half your peak
memory bandwidth. 

If the CPU is new I would return it, simply because it isn't functioning 
correctly, even if it is stable. If it is out of warranty there is no problem 
using it in single channel, all you sacrifice is some RAM performance and in 
most use cases you wouldn't notice the difference anyway.

I hope that makes sense. 

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Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 25463	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 9 hours 29 minutes ago at 3:30am
	It only works using channel A, that means there is a good chance channel B on your memory controller is either completely dead or can't handle your particular RAM kit (in which case it is defective). As I said before the IMC on the CPU has 2 channels, A and B. If one is working then using that channel would result in a stable and fully usable system. You can try checking your CPU for any missing or bent over pins, that can also result in a channel dropping out but it's unlikely. The odds of a single pin being perfectly bent in such a way that the CPU still fits in the socket is low. The way the system RAM operates faster is by using 2 channels to the CPU. 2 channels means double the bandwidth to and from the CPU and RAM. A single channel working means the system still works but the performance takes a hit. Dual Channel vs Single Channel performance. The system is behaving as if you only have 1 stick of RAM installed because both are being accessed through a single channel rather than split between 2. Basically the connection between the CPU and any RAM you install in channel B is cut and given it's broken inside the CPU itself there is no way to fix it. The CPU can still see and use RAM in channel A however so the system continues to function normally given the RAM channels function independently of one another. Like pulling a spark plug lead off a 2 cylinder engine while it's running, you lose some power but the engine will continue to run. In the case of a CPU however it won't damage the system to do so, you just lose half your peak memory bandwidth. If the CPU is new I would return it, simply because it isn't functioning correctly, even if it is stable. If it is out of warranty there is no problem using it in single channel, all you sacrifice is some RAM performance and in most use cases you wouldn't notice the difference anyway. I hope that makes sense.


Veghcs1973 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 26 Jan 2025 Status: Offline Points: 125	Post Options Post Reply Quote Veghcs1973 Report Post Thanks(0) Quote Reply Posted: 9 hours 19 minutes ago at 3:40am
	Well then I'm using this in channel mode, can see all 64 GB, I'm not spending any more money on this PC

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 25463	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 3 hours 11 minutes ago at 9:48am
	That is entirely up to you Sorry I couldn't be of more help, you can try opening a support ticket with AMD directly regarding your CPU, they may be able to help you out more. Good luck.