CPU Stability Testers?

[Gene Huh]

Hello all,

I've got a beige G3/275 overclocked to 300MHz, and although it seems 
stable (it runs OS X 10.2 just fine), I'd like to carry out a more 
rigorous test to verify the absence of any cryptic errors.

I was wondering if there were any software utilities that will 
rigorously test a G3 or G4 CPU's performance.

I have noticed that, on the wintel 'dark side,' that a number of such 
apps are available.  Prime95, in particular, has a "torture test" 
mode that exits with an error if a miscalculation fault occurs. 
There is a similar app for OS X (Glucas), but I have not been able to 
run it successfully (nor do I know if it has a test mode).

On the Mac side, are there any G3/G4 stress-test apps for OS 9/X?  I 
know there's a bunch of memory testers (like Gauge Pro and the like), 
but I've looked all over (unsuccessfully) for one that specifically 
exercises all aspects of a PowerPC CPU.

Thanks in advance,
Gene (digest mode)