plz help: how to stress test?

[Boonesmi]

im looking for some info on how to stress test my system. and i cant run q3 because its a low end system with no open gl

first a little info. i just put this pc together with spare parts i already had, it has a k6/2 350mhz running at 400mhz

a matrox millenium pci 2mb video card
an old 10 base 3com NIC (ISA)
generic pci sound card
motorola (ISA) 56K modem
3 gig quantum hdd
24x pioneer cdrom
64mb micron pc133 (obviosly its only running at 100mhz now)

im thinking about selling this. but i want to make sure its going to be stable (overclocked 350 @400mhz) cause if not ill drop it back down.

normally i would run q3 in a loop for awhile, but this pc wont run q3.

hehehe ok ok now to the question....
what would be some good ways to test the system?

 

[lifeguard1999]

Two user utilities that stress the CPU can be found at Overclockers.com

 

[WarCon]

I use Prime95 in torture test mode, pass to unlock it to get those test modes is 9876 (its in the readme.txt file but takes like 5 mins to find it at least for me). If you get errors in the program like rounding errors then you are riding a little unstable. To really stressssssssss test it, get 3dmark and run what it will run in loop mode and run rc5 client or prime95, but rc5 always makes my processor hotter by up to 3C.

This page for RC5 info...RC5 for Team Anandtech

Use this link for prime95...Prime95

And this one for 3dmark...3dmark