Sure it's Chiphell again but its a list from Sapphire and they look rather official. Of course take it with caution, a grain of salt and everything else as nothing is confirmed just this.
Sapphire plans no less than six non-reference Radeon HD 7970 models apart from the vanilla AMD reference design card. Among these, the top-of-the-line cards are codenamed "Atomic RX" and "Atomic WC". One can guess that the "RX" is an air-cooled card, and the "WC" a water-cooled one. It packs blistering clock speeds of 1335 MHz core, with 5735 MHz (1433 MHz actual) memory.
The other card that caught our eyes is codenamed "FLEX 6G". The Flex variant typically features a flexible display output configuration. This card is said to have six mini-DP connectors.
While this card sticks to AMD reference clock speeds, it packs a whopping 6144 MB of video memory, all wired to a single GPU. Then there are other milder factory overclocked cards apart from the Atomic; there's Toxic 3G, and VaporX 3G.
But look on the top of the list, there's a 2304SP model scratched through, typo .... maybe
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