FX-53 compatibility

[corndog36]

I recently bought a used FX-53 socket 939 processor, not realizing that AMD had changed the memory requirements to allow the use of unbuffered memory. I have two CMX52RE-3200LLPT modules that I want use, but the system wont boot. Is registered ECC not compatible? Or is the processor DOA. (I get a long beep and 2 short beeps)

[corndog36]

I pulled one of the modules and now the system boots and runs fine. I had the two sticks in A1 and B1. (the two sticks are identical). Any ideas on why this system won't boot with both sticks installed?

[RJLeong65]

I recently bought a used FX-53 socket 939 processor, not realizing that AMD had changed the memory requirements to allow the use of unbuffered memory. I have two CMX52RE-3200LLPT modules that I want use, but the system wont boot. Is registered ECC not compatible? Or is the processor DOA. (I get a long beep and 2 short beeps)

 

Actually, with the AMD processors, their memory controllers either don't support registered memory at all or require the use of registered memory. The FX-53 was manufactured in both Socket 940 and Socket 939 versions, where the Socket 940 version required the use of registered memory and the Socket 939 version did not support registered memory at all. In the case of your FX-53, it isn't compatible at all with registered memory (although some people have found success running a single stick of registered memory in single-channel-only mode).

 

As for unbuffered ECC memory modules, Corsair no longer makes any. All memory that's currently manufactured by Corsair is either "unbuffered and non-ECC" or "ECC and registered."