I would also encourage anyone to test the miners... now rather than waiting after the launch to discover something isn't working...
I have testet the sgminer on my System whit a ASUS R9 290X
the miner give my a :
fatal JSON ERROR in configuration file
configuration file can not be used
hmm whats wrong?!?
My config file sgminer.conf:
{
"pools": [
{
"url": "***",
"user": "***",
"pass": "***"
}
],
json error are connection problems, meaning you have problem to either connecting to the "*****" pool or wallet