Card would feature 1.2x performance of Radeon HD 7970. It is rumored that it may have 2304 stream processors and 3GB of GDDR5 memory, running on 384-bit interface with a clock of 6GHz. Radeon HD 8970 would require up to 250 Watts for calculations and 3 Watts when idle.
Radeon HD 8970 would be equipped with HDMI port with 2 additional mini-DisplayPorts.
Radeon HD 7990 delayed
According to ORB-Hardware Radeon HD 7990 may be delayed because AMD cannot produce sufficient cooler for this card (which requires lots of power – far more than Radeon HD 6990). Card is not planned for first and second quarter of this year.
- READ MORE (Source): Radeon HD 7970 successor – Tenerife XT, Radeon HD 7990 cancelled? ~ OBR-HARDWARE