No, 4670k will not bottleneck even 290x xfire, in other words your processor is fine for even the best gpus to date, but 260x is not that powerful though and could only play bf4 on medium for 1080p.
No, 4670k will not bottleneck even 290x xfire, in other words your processor is fine for even the best gpus to date, but 260x is not that powerful though and could only play bf4 on medium for 1080p.