Memory diagnostic result

We had our main machine blue-screen on us a couple times within a week.

I took the memory out and put it into a different machine and ran Windows Memory Diagnostic from floppy (those USB floppy drives are cheap and actually functional and handy, by the way).

I left it running in Standard mode for about 24 hours. When I came back to check it, it had done 300 passes, and it showed one error during pass 132. (It also reveals which module when I drill down.)

Is this conclusive that it's bad memory? What are the odds it's a fluke mis-reading or perhaps some intermittent imperfection in some piece of hardware in the machine that this diagnostic test is running on?

The reason I ask is not so I know whether to replace the memory or not -- that's a given, it's history. I'm asking because I need to make a decision on whether our main computer that was blue-screening is now okay because we removed this memory, of if it may still have other bad hardware because this memory diagnostic is not really 100% reliable.

Thanks!

I set the ram to it's rated specs and run memtest, if it gets errors it's of to rma.