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Hey guys. What are your opinions on pcie riser cables? -anyone had performance/compatibility issues? -I have pcie4.0 mobo (x570-p) and will at some point get 4.0 nvme, can I disable pci-e 4.0 for the gpu slot ONLY? -any brands to avoid? Or are the cheap £15 ones ok? -are pcie gen 4.0 ones...

Hey guys, Just looking for some cooling suggestions as had my gaming HTPC overheat recently, which hasn't been a noticeable issue until Fallout 4, in which it shuts down after running my temps up to... -91c CPU -80c mainboard(!!) -51c HDD and 86c on the GTX 970...