The FX9590 is not supported on your Motherboard.
The fastest FX processor supported on your Motherboard using the most recent bios is the FX8370 which operates at a clock speed of 4Ghz base and 4.3Ghz Turbo vs the 3.6GHZ base and 4Ghz Turbo on your current processor. Aside from that, the chips are identical.
More information on compatibility here.
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