Problem with a amd 64 Opteron and FreeBSD 5.2.1

James R. Van Artsalen james at
Fri May 7 01:47:53 PDT 2004

James Hale wrote:

>I've a problem with this amd64 OS and a Tyan Motherboard. This system locks
>up after about 5-7 hour during large data transfers. Any Suggestions?
>CPU		AMD Opteron Model 244 (1.8GHz)
>Memory	Four KINGSTON 1GB DIMM registered DDR PC3200

Is the Opteron 244 rated for that PC3200 DRAM?  I thought PC2700 was the 
max except for the 248 and 246.

If the BIOS fails to properly reduce RAM timings based on the CPU 
stepping then Bad Things might happen.

If you have any PC2700 DRAM you might try it.  See what this line says 
in /var/run/dmesg.boot to find out the stepping (which is encoded in the 
ID - see 
for information as to what this means).

CPU: AMD Opteron(tm) Processor 244 (1793.45-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0xf51  Stepping = 1

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