Nice you got your 4 cards running nicely

Main issue I have , is that all my miners are at my office that I rent , free electric as it is included as part of my rent......excellent during the day 8am to 7pm full Air con , but after 7pm to 7.59am  no aircon , it gets very very hot in here with all my rigs running, so I tend to not over push my cards as they will work great during the day , but once the heat starts to build after the air con is switched off , the cards can crash , so anything around 26-27 mhz is great by me