Poseidon and Matrix tend to run some ASUS factory overclock. I suspect that means they won't be available until ASIC yields (or raw binned-out part inventory) have increased to the point where they have enough parts on hand to justify the product run. There always seems to be shortages of quality VRAM as well, which seem to get a little worse each GPU generation ... these tend to impact (limit) the availability of top-end cards the hardest.
"All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams
[/Korth]
