Normally, in my country the price of a GTX 780 is about 100$ more than the price of a R9 290, so I thought I should wait for a non-ref R9 290 a get that because it's less expensive and supports Mantle. However, my local shop has introduced a promotion that bring the 780 to the price of a reference R9 290, but only lasts till December 19th. The reason why I haven't already bought a 780 is AMD Mantle. What do you think, is Mantle worth waiting for until early January, or should I get a 780 now?
TL;DR: GTX 780 now or R9 290 early January, for the same price, considering Mantle.
TL;DR: GTX 780 now or R9 290 early January, for the same price, considering Mantle.