you're right about the 7990, it cant handle overclocking like the 7970, i gave it full Catalyst and the coil wine was dreadful, so i backed it off to stock.
it behaved exactly the same as when i blew the 7970 years ago, the one that took 10 weeks to RMA
it behaved exactly the same as when i blew the 7970 years ago, the one that took 10 weeks to RMA

