I also have problems on 280x with high temps.
Can someone tell me how can this afterburner help to run my GPUs cooler? What can it do that I cannot with miner config or AMD Catalyst (--gpu-fan, --gpu-engine...)?
and what can you do with miner config actually ?
on my 280x, miner config can't set clocks lower, only higher,
but afterburner can, that trouble started with 14.6 drivers.
gpu-z will show you everything