Usually a brownout is what causes the damage; a blackout usually doesn't cause any issues (Though keeping the computers on a UPS is ideal)
Are the hashrates lower on one card, or are all the cards hashing slower? Usually if there's an issue with a card it won't even show up.
Both of them are underperforming, But the power company here really suck ass, So it wouldn't surprise my if drops in voltage happened frequently.
If you're trying to judge your mining performance, look at your local hashrate in cgminer or whatever you use. Not at what the server reports. That fluctuates far too much and depends on whatever bugs the database currently has.
If a graphics card was broken, it probably wouldn't mine at all.
I have been looking at what CGMiner is reporting and its slightly under what i normally have, I suppose the best thing to do is leave it be till the morning and see how its running.
Thanks for the help everyone.
Edit: Its still complete shit even after an hour and half.
http://middlecoin2.s3-website-us-west-2.amazonaws.com/reports/1Ak6ebQp5XfesZJibusVdbLx8s5AL83Fg4.htmlI give up and I'm off to bed, Touch wood by the morning my hash rate will improve.