The Matrix HD7970 Platinum reportedly has a 1050MHz base clock, 1100MHz boost clock and 3GB GDDR5 clocked at 6600MHz. Pricing and availability is unknown.
Additionally, it has a very cool feature — the Matrix logo on the side is illuminated by multi-color LED’s — and those change accordingly to the usage of the card (there are five modes). Oh, did I mention it has a backplate?
Moving forward to the GPU — this card has Tahiti XT (aka XT2). It supports PowerTune Boost, so it comes with two clocks – 1050 MHz base and 1100 MHz for boost. You probably think that’s not that impressive, but it is, because this card out-of-the-box is just asking for even more overclocking. ASUS has already set the memory for you to 6600 MHz effective speed, so you should only focus on the core.