I currently have an and fx 4350 which heavily bottlenecks my gtx 970 so I need a new CPU and I have an am3+ CPU socket. Should I go for an fx 8350 or 8370? Is there anything better for that socket? And would that work with a gtx 970 and a 550 watt psu? And is upgrading from an FX 4350 to a FX 8350/8370 worth it?