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I wouldn't throw money at an AM3 platform. If you want a worthwhile performance upgrade, save until you can afford a Ryzen 1600 or an i5.
This is true. Even a Ryzen 5 1400 will be a bit better if you're buying new, while costing the same, commanding a cheaper motherboard (FX 8 cores SHOULD have the more enthusiast level boards, which can run you around $125 for a proper one) draws less power, doesn't need beefy cooling to run comfortably, and will probably have better game support as it's recent stuff, yo.