CPU Overheating after installing new GPU

I recently installed a new GPU, an XFX RX 460 4GB, but now my CPU keeps overheating, I'll turn my PC on and the CPU temps skyrocket... My CPU is an A8-7600, and it's heatsink is clean, along with a working fan, and my PC has 2 other fans that work as well...

I've been trying to fix it, but can't find a way, it also may be helpful to let you guys know my CPU does run at 3.1Ghz normally, and did perfectly fine before this...
Reply to Tallibabble
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    It's overheating because it's fully utilized, maybe with old gpu it could use 70% cuz of the bottleneck, but now at 100% it's using more heat...
    Reply to mihalyk2000
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