1BTC + actual shipping. Right now running @ 550mhz for optimum heat/power. This is the higher chip count model of s7 - qty 162 - thus more efficient than later batches. The Batch 2 runs 4.6Th @ 575mhz, and Batch 4 runs 4.8TH @ 600mhz. Also the controllers handle more s7 blades if needed. Sold only as a pair. Run completely stock Antminer settings, never had an issue.
Thanks!
Pmed