A noob looking for a little guidance if you could.

I picked up the ASUS Rx 560 OC Edition and threw it into an old spare PC with intention of learning more about mining and figured it was relatively cheap so if it doesn't work out or I fry the card I am not out too much money. I am using Claymores dual miner and the August edition of the AMD mining drivers on windows 10. Two things that are happening.

1) I run Claymores script and the card spins up to 90°c with the fans at 100% before shutting down about a minute later. I moved the rig to the garage as it's around 0°c and I added an intake case fan blowing directly at it. Card is still averaging 86°c while the interior of the case is hovering around 10°c.  This does not seem right and my guess will burn the card out pretty quickly.

2) Daily average from ethermine.org is around 7MH/s which is about half of what is reported heere on this thread.

So does anyone have any tips, tricks or a stable BIOS update that would help either of these issues (perferrably both)? Also given my noobness what are straps and strat referring to?  I am sure there are more questions I will need to ask but baby steps.

if I get this figured out then I will start to ramp up with a number of cards and an open air rig.

Thanks for any help you can give.

ChunkySoup