The 7990 was a joke, they were supposedly binning lower voltage gpu's for these cards and a lot of the reviews stated how "cool and quiet" it ran. Yet the product most of us that bought it got was a loud and hot pain in the ass. It's like at some point amd realised they didn't have enough low voltage dies to put on the card so just started using any they had to hand which overwhelmed the cooler.
Here's the product launch video:
Notice the "cool and quiet" rhetoric.
And here's the same gimp claiming that "we won't have to worry about the 6990 being loud and hot". And yes, it was loud and hot.
I know I bought two of them fro crossfire when they slashed them to half price.. what was I thinking

had to stick them both under water in the end, didn’t need central heating in the winter
