I'm looking to upgrade my i5 3340s as it's getting a bit bogged down in games like BF1 and PUBG and was thinking about Ryzen. But I've just seen that a used 3770 can be got for €170. This method would be a lot cheaper as I could just drop it in to my current system and also I would not have to bother about re-installing Windows. Would I see similar performance from an old i7 like the 3770 due to Ryzen's IPC being around Haswell and Ivy Bridge being fairly similar? I'd be happy if it came in a little bit below the Ryzen 5 and i5 7500/7600 in terms of gaming but I'm not sure it will. This would be paired with an RX 480 and 8GB of ram.