I'd get another exhaust fan. They plug into power outlets on the mobo and fit into one of the case's expansion slot places. I'd also clean the dust out of the air intake places and get the dust bunnies out of the mobo, CPU fan, and exhaust places. If it's been over a year since this was last done, you definitely need to do it. Be careful to ground yourself before removing the cover, and try not to touch the components. I use a can of compressed gas to help get rid of the dust. You'd be amazed at how much dust accumulates in the heat sink fins on top of the CPU.