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Would having only 8Gb of ram have anything to do with it?
Upgrade to 16gb of fast ddr3 and overclock to 4.5 if you can. There's very little need to replace that CPU currently if overclocked for gaming. Single core at 4.5 it's likely faster than a lot of ryzen setups including well cooled ones. I. E if you aren't regularly seeing 90-95%+ cpu useage it's a pointless upgrade.