In Canada several webshops started listing the upcoming Radeon HD 7950, Prices range from $479.0 to $493.0 Canadian.

Interstingly enough they show specs as well, so that confirms 1792 Shader processors with a core clock frequency of 900 MHz and an effective data-rate on the memory of 5500 MHz. :

Key Specifications:
GPU                   :   HD 7970
Core Clock (MHz)      :   900MHz
Stream Processor      :   1792
Mem Clock (MHz)       :   5500MHz
Mem Size (MB)         :   3072MB
Mem Bus (bit)         :   384 bit
Mem Type              :   GDDR5
Card  Interface       :   PCI Express 3.0
Board Form            :   ATX
D-SUB                 :   N/A
DVI                   :   1x DVI-I
HDMI                  :   1 x HDMI
Display Port          :   2x Mini Display Port

Companies listing the cards are:

http://www.ncix.com/products/index.p...cture=Gigabyte
http://www.pccanada.com/viewitem.asp?id=37646
http://www.ecsrv.com/ShopSearchPage....GV-R795WF3-3GD

If we take 490 CAN USD and convert that, in EUR it would be 375 EUR and for the USA roughly 485 USD.