Need some info before buying

hello I’m planning to get a new pc, mainly for gaming purposes, but i am not really into knowing which components are best etc. etc. so i would be very grateful if someone who does know this kind of staff could answer few a questions for me. 1. which processor would be better Intel® Six Core i7-3930K or Intel® Quad Core i7-3820? 2. i was thinking about taking nvidia geforce gtx 690, but i...