The issue of the amount of RAM that incorporate graphics cards and what is needed has always been surrounded by some controversy, on one hand, manufacturers often take advantage of the ignorance of consumers who think a graphics card is better the "more gigs" have, although we compare chips from different ranges. Moreover, it is true that it is more common that larger amounts of vRAM are required to run games at increasingly high resolutions and higher quality textures.
Anyway, today we have available the new AMD Radeon R9 290x with 8 GB of GDDR5 memory, incorporating twice the 4GB models available to date.
These models will arrive through assemblers of GPU AMD graphics cards such as HIS, Sapphire, ASUS, MSI, Gigabyte etc .. so in the next few weeks we will begin to see new models in their catalogs. Its price will be higher than 4 GB models, by the time we can find at overclockers.co.uk over 100 Euros difference from 4GB model.