Note: Be weary of rigs who state they only work with a specific pool.

Stable pools with single coin mining is recommended for best results. Higher rejected hash rate is expected on multipools or switching pools. Configure your difficulty! 

VERY IMPORTANT !! Most problems are caused by this!! Always use 16384 DIFFICULTY OR HIGHER. 
VARDIFF Pools can have problems with large hashing miners such as KNC Titans!! 
 **Fast coins can cause pool problems with large miners like these** 

Mining fast coins may cause lower hashrate, LTC Mining is preferred. 
Keep in mind that Multipools often switch (fast) coins, you might get a very reduced hashrate when mining fast coins. Tested and working pools: 
- give-me-coins.com (Perfect)
- ltc.suprnova.cc (Perfect)
- nicehash.com/westhash.com (Perfect WITH DIFFICULTY SET)
- hamsterpool.com (If switching fast between coins, unstable hash rate)
- litecoinpool.org (Perfect)
- asicpool.info (Perfect)
- ghash.io (Unstable hash rate, difficulty related issues)

 When pool data is updated it can take 3-5 minutes for the miner to cycle and start properly hashing. Making quick changes in succession will only make things worse, so give it time with each change. 
 If your hashrate stops or drops to 0, it is more than likely a cause of the pool, difficulty or too fast coin. Issues related to pools are not compensated. If you're a renter I will try to help you fix any pool related issues if I see a problem with the hash rate.