As it was with the Jupiter, let the heat build up in the case.  They should be stable up through 50C.  

Wafflepool creates bad vardiff issues with hardcore scrypt miners.  Try to eliminate any rejects, start solo-mining to a local wallet...then post results.   Vardiff doesn't matter if the solo-miner client is on a Gigabit LAN, or even a 100MB LAN.   Start solo, then go pool.  Perhaps mine an alt with low diff if you want to get paid out for test time....something like potcoin or feathercoin has good market volume.  Doge and ltc are too difficult to test-solo-mine.

Edit:
Lol  @ Wafflecoin

http://wafflepool.com/faq

They top out at 128MH for VARDIFF...they even make you set it at login for the worker.  Think you might need to move pools bro.