So I am kinda on a budget here just so you know first. I have a AMD R9 380 GPU.... Now I have a I7-4790k at 4.0 Ghz, so I think I am fine here. I want to get the GTX 1070 FE for really 1080p gaming at 144hz. My only problem is that from bench marking websites, its really only about a 40-50 FPS difference. So I thought about getting the Gigabyte GTX 1080 F3oc. Its about $100 more than the GTX 1070 FE. My question is, is it a good idea to upgrade to a 1070 in the first place for that much of a boost for 1080p 144hz gaming and do you think the GTX 1080 is worth around a $120 more for that much performance as well.
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My current GPU- https://www.amazon.com/MSI-R9-380-GAMING-4G/dp/B00ZPOBI0M/ref=sr_1_3?ie=UTF8&qid=1501203681&sr=8-3&keywords=AMD+R9+380
GTX 1070- http://www.bestbuy.com/site/nvidia-founders-edition-geforce-gtx-1070-8gb-gddr5-pci-express-3-0-graphics-card/5330700.p?skuId=5330700
GTX 1080- https://www.newegg.com/Product/Product.aspx?item=N82E16814125880
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My current GPU- https://www.amazon.com/MSI-R9-380-GAMING-4G/dp/B00ZPOBI0M/ref=sr_1_3?ie=UTF8&qid=1501203681&sr=8-3&keywords=AMD+R9+380
GTX 1070- http://www.bestbuy.com/site/nvidia-founders-edition-geforce-gtx-1070-8gb-gddr5-pci-express-3-0-graphics-card/5330700.p?skuId=5330700
GTX 1080- https://www.newegg.com/Product/Product.aspx?item=N82E16814125880