Problem with a amd 64 Opteron and FreeBSD 5.2.1

[James Hale]

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?

Below is the final message on the screen and below that is the machine
configuration.

Fatal Trap 12 Page Fault while in kernel mode
Cpu =0 ; apic 10 =00
Fault Address=0x18
Fault Code=Supervisor Write, Page not present
Instructor Pointer=0x8: 0xffffffff8020c5a7
Stack Pointer=0x10: 0xffffffffad412ba0
Frame Pointer=0x10: 0xffffffff51c3c0
Code Segment=base 0x0, limit 0xfffff type 0x1b
		=dpl 0, pres 1, long 1, def 32320, gran 1
processor eflags=interrupt enabled resume, iopl =0
current processes=16 (irq5 ; bge0 twe1)
trap number=12
Panic: page Fault
Cupid=0


Operating
System	FreeBSD AMD64

Chassis	Chenbro Micom RM414 4U rackmount 550W+ PS
Motherboard	Tyan Thunder K8S Pro S2882G3NR SATA
CPU		AMD Opteron Model 244 (1.8GHz)
Memory	Four KINGSTON 1GB DIMM registered DDR PC3200
SATA RAID	3Ware 8506-8
SATA disk	Eight Hitachi 250GB
IDE		60GB system drive
DVD RDWR+-	DVD burner, notebook slim design

During large data transfers the machine locks up complaining of page
faults.

Is the type of memory an issue with this design.

Thanks
Jim