AMD has not made flash memory for many years. They put their flash assets into Spansion and spun that out (before they purchased ATI, IIRC).
I think your calculations are off by a factor of ~ 24. Assuming a 4 week month, and 168 hours per week, the monthly power lost is 45*168*4 = 30240 W-hr = 30.2kW-hr. At 6.2 cents per kW-hr, that is over $1.80 per month. Over 5 years, that puts you at over $100 total.
ISoldat53 writes "The Consumerist has awarded Comcast the Golden Poo award for the worst company in America. From the article: 'After four rounds of bloody battle against some of the most publicly reviled businesses in America, Comcast can now run up the steps of the Philadelphia Museum of Art and hold its hands high in victory — it has bested everyone else to earn the title of Worst Company In America for 2010.'"
AMD has no flash anymore -- they spun out the Spansion joint venture last year. AMD is entirely a CPU company now.