What's the highest hashrate for 280x with private kernel at this time?İf it's effective possible to buy ))... i have 25 280x for gpu mining.
My miner is doing about 450 Mh/s at 1175/1025 MHz on 14.12.
But I didn't test it with 15.3 drivers yet, which are supposed to give a good boost, probably it'll reach 500.