Try xmrstak, it has a number of different intensity settings (described in the config file) that you can set to reduce temp / increase system responsiveness. You might also try using some air duster to blow out any dust.
There's a bunch of videos on youtube talking about how to build a multi-gpu miner. Basically you'll need a motherboard with multiple pcie x16 slots (they make special mining boards or you can get a gaming mobo) or you can buy pcie x16 to pcie x1 riser boards and just plug them into any pcie slot.
Try xmrstak, it has a number of different intensity settings (described in the config file) that you can set to reduce temp / increase system responsiveness. You might also try using some air duster to blow out any dust.
There's a bunch of videos on youtube talking about how to build a multi-gpu miner. Basically you'll need a motherboard with multiple pcie x16 slots (they make special mining boards or you can get a gaming mobo) or you can buy pcie x16 to pcie x1 riser boards and just plug them into any pcie slot.