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Your cpu only has a limited number of pci-e lanes available. Sadly I can't find the official documentation but from different forums and other people with these issues it appears that the 3xxx series apu does not support a second PCIex16 slot.


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It's difficult to say on basic specifications alone. the idea Irsu85 brought up is a good one, but for all we know the thinner one might use fancy cooling mechanisms like vapor chambers, has more/larger heat pipes or has an aluminum unibody that assists in dissipating more heat. If you have the make and model. Try looking for video reviews. Often times they ...


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