is this a sign of bad hardware?

[Palle Girgensohn]

Hi,

We have a machine with ASUS A67V8-X mobo and AMD 2600+ CPU.  FreeBSD 
4-STABLE from like four weeks ago.

It crashing three times per day, most often when CPU is working hard, 
typically during compilation.

Example excerpts from messages:

May 13 17:28:08 fikon /kernel: panic: pmap_release: non ptd page
May 13 17:28:08 fikon /kernel:
May 13 17:28:08 fikon /kernel: syncing disks... 57 16 12 12 12 12 12 12 12 
12 12 12 12 12 12
12 12 12 12 12 12 12

and



May 12 16:42:34 fikon /kernel:
May 12 16:42:34 fikon /kernel:
May 12 16:42:34 fikon /kernel: Fatal trap 12: page fault while in kernel 
mode
May 12 16:42:34 fikon /kernel: fault virtual address    = 0xbfd40d7c
May 12 16:42:34 fikon /kernel: fault code               = supervisor read, 
page not present
May 12 16:42:34 fikon /kernel: instruction pointer      = 0x8:0xc031100f
May 12 16:42:34 fikon /kernel: stack pointer            = 0x10:0xe91ffed0
May 12 16:42:34 fikon /kernel: frame pointer            = 0x10:0xe91ffee0
May 12 16:42:34 fikon /kernel: code segment             = base 0x0, limit 
0xfffff, type 0x1b
May 12 16:42:34 fikon /kernel: = DPL 0, pres 1, def32 1, gran 1
May 12 16:42:34 fikon /kernel: processor eflags = interrupt enabled, 
resume, IOPL = 0
May 12 16:42:34 fikon /kernel: current process          = 16902 (postgres)
May 12 16:42:34 fikon /kernel: interrupt mask           = net bio cam
May 12 16:42:34 fikon /kernel: trap number              = 12
May 12 16:42:34 fikon /kernel: panic: page fault
May 12 16:42:34 fikon /kernel:
May 12 16:42:34 fikon /kernel: syncing disks... 20 5 4 4 4 4 4 4 4 8 2 2 2 
2 2 2 2 5 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2



To me, this looks like hardware problems. Do you agree or disagree? Can 
there be anything else? Memory, mobo or CPU?

Regards,
Palle