how long does it take metest to finish..or does it jsut keep repeating until u say so?

It continues running until you tell it to stop. I'd recommend at least 10 full tests to take place, but it's probably best to just leave it on over night.

Set it to run the extended test & the more you leave, the more chances it has to run into errors. If you leave it running for a few days & you have no errors, you can rest assured your ram is good.

k i was j/w bc i had left on vacation while it was on and it was still going when i came back lol