Get an FX 8320, and overclock it to 4.0 ghz and change it to fx 8350 in old or single threaded games yeah i5 4670k>fx 8350 currently and for moderately threaded games i5 4670=fx 8350, and in the near future fx 8350> i5 4670k, let's review these benchmarks here
http://www.techspot.com/review/591-medal-of-honor-warfighter-benchmarks/page6.html (MOH warfighter fx 8350 performs as well as i7-3960x)
http://www.techspot.com/review/601-black-ops-2-performance/page5.html (call of duty black ops 2 fx 8350 performs as well as i7-3960x)
http://www.pcgameshardware.de/Crysis-3-PC-235317/Tests/Crysis-3-Test-CPU-Benchmark-1056578/ (crysis 3- fx 8350 better than i7 3770k and just below i7-3950x)
http://www.hardwareheaven.com/reviews/1598/pg6/amd-fx-8350-processor-review-battlefield-3.html (bf3 fx 8350>i5 3570k)
http://www.hardwarepal.com/batman-arkham-origins-benchmark/8/ (batman Arkham Origins fx 8350= i7 4770k after AMD's catalyst release)
http://www.hardwarepal.com/battlefield-4-benchmark-mp-cpu-gpu-w7-vs-w8-1/4/ ( battlefield 4 ultra HD FX 8350 equal to i7-4770k)
http://www.hardwarepal.com/battlefield-4-benchmark-mp-cpu-gpu-w7-vs-w8-1/8/ ( battlefield4 full HD the same scenario)
http://www.techspot.com/review/645-tomb-raider-performance/page5.html (Tomb raider 2013)
a lot of more incidents which shows these CPUs enjoy actually the same performance, in one game one beats the other, in the other game there is another scenario, but something is for sure, in crysis 3 for example i5-3570k uses 80% percent of it resources AMD fx 8350 just uses 60% in COD ghost i5 4670k uses 44% of its resources fx 8350 only uses 25%
in the future fx 8350> i5 4670k, wanna bet!? just look at these links
* where is the i5 in UBISOFT's system requirements!?
http://www.game-debate.com/games/index.php?g_id=4546&game=Watch%20Dogs Ubisoft has confrimed that this game is heavily threaded, and has promised i5 owners can hit high sttings!! NO ULTRA SETTINGS
* When Capcom says its new engine takes full advantage of i7, which is good news for fx owners, Capcom really means it
http://www.gamasutra.com/view/feature/132533/sponsored_feature_resident_evil_5_.php?print=1
* Epic says the more cores the better
http://www.shacknews.com/article/70348/epic-talks-unreal-engine-4