Whoa that's some hot memory. Have you ran VRM at such temps for how long and/or before with other cards? Somehow this made me think that BBQ Coin should have had temperature as a factor to diff.
The 7970 has run pretty constantly for 5 days, the 7870 for 10+, with a few minor interruptions when I've decided to play with cgminer and options rather than let gui-miner run them. Not sure how long the 110C episode was - I normally check on the cards with GPU-Z a couple of times a day, and now especially after playing with cgminer because of the 110C event!
Have both at -5% power from Catalyst options, but this didn't seem to affect hash rates, temperatures or voltages.