[CentOS] how can I stress a server?

Does this system have shared video/system RAM?  If you have video
memory shared with system memory, there is going to be memory that
can't be tested unless you rotate memory chips or put in a vga card.
In memtest+ 2.10 configuration, set for no reserved memory and watch
the memtest corrupt the video output on a shared memory system.

i have some several year old DL360's and ML370's and love em -
especially hw raid, but i my local supplier hasn't had any for several
months.  Uptil a few months ago, password reset info on ebay was sent
in the clear, so i have a very hard time trusting ebay.  It would be
great if something like LinuxBios / OpenBios could stresstest the
machine and then disable any RAM addresses that proved flaky - whether
ECC or not.