HIS 7790 iCooler Turbo 1GB GDDR5 Video Card Review
 

The new HIS 7790 iCooler Turbo card is well balanced and is recommended to people on a tighter budged which will want to upgrade their old GPU in order to be able to play the latest games on monitors up to 24’’. The cooling system is simpler compared to the offerings from XFX or PowerColor and an overclocking utility is supplied on the HIS website for added value.

http://www.madshrimps.be/articles/article/1000443/

is there a 2GB version of the 7790? with multi monitor setup's having only 1GB can be a bottleneck

As far as I can see, there is no 2GB version, but anyway, I wouldn't bother gaming in a multi-monitor setup with a single 7790 since the results would be quite choppy. For a single 24'' monitor with medium and sometimes high settings it could work fine (considering that you also have a powerful CPU in order to gain a tiny amount of frames too and to avoid any limitations).