Legit Reviews noticed Newegg is already selling a PowerColor Radeon HD 6790 graphics card for $149.99. The official launch is expected real soon.
The card listed is by PowerColor and the model number is AX6790 1GBD5-DH. It looks like this card is clocked at 840 MHz on the core and 4.20 GHz memory. The site shows that the 1 GB of GDDR5 memory is connected with a 256-bit wide memory bus interface. Looking at the pictures we can see that the card has a single 6-pin PCIe power connector as well. The AMD Radeon HD 6790 is rumored to have 800 out of 1120 of stream processors of the 40 nm Barts GPU enabled.