you guys running all these machines at work or something? These 256+ nodes?One thing that can topple the network is some bored Chinese technician trying to run the mining on one of their build-for-record-and-now-idle supercomputers. 7168 GPUs at ~500MH/s and 15000 CPUs at ~10MH/s would be 3.65TH/s, or a block every 10 minutes.