I'm currently running a 4 card mining rig with powered pcie 006c risers and a 1200W high quality Corsair PSU. The GPUs run at around 69C when mining.
However I was just wondering if there were any fire risks associated with the rig and if it is safe to have the rig running 24/7 next to the walls in my house (drywall).
I know this is probably being over cautious but am just making sure. Thanks

Cheap or undersized cables/connectors is your primary concern.
If you are powering your risers with molex connectors, then make sure you're not running 4 of them off a single cable.