CPU/Memory test for Dell PowerEdge?

[Scott Ehrlich]

I'm looking for a free CPU/Memory intensive testing program for a Dell
Poweredge 2500.    I'm trying to locate the reason why it reboots at
random times, but nothing in the logs show a problem.   I want to
narrow it down to hardware or OS (Win NT).   I plan to run the testing
continuously overnight.    It would be great if it could also log
error results.

I have the Dell Diags program and still need to look at the
granularity of testing it offers.   It would be ideal to have
something which performs a continuous full test of the CPU and memory
of at least a gig.

Thanks.

Scott