I have two Lketc-miner running here, both supposed to deliver 1 Th/s. That's what they did in the beginning. "Beginning" means: For about a week. Then, the first of the two miners reduced the hashing speed to 500 Gh/s. It turned out that the PSU only deliveres juice on two channels, two are death.

Meanwhile, it is getting warmer outside. And all the sudden, the second of my miners also reduced its hashing power to 50 %. Again: The PSU stopped delivering juice on two ports.

Reactions from Lketc: Nothing. Nada. "Nancy" seems to have disappeared (well, I maybe should try to buy another one, I'm sure she would pop up...).

So this leaves me with additional costs of +400 US$ for two PSU and the feeling, that these miners may not be worth all the money.

We have 20°C outside, and I'm afraid things may get worse once it is getting hot...