Refurbished Bitmain Antminer S9i 14t 14.5t , APW7 PSU Antminer Bitcoin Miner

Refurbished Antminer S9j 14t 14.5t Asic Miner Machine with original bitmain power

S9j is an upgraded version of S9i and S9.

Compared with the S9 version, the S9j has higher noise decibels, but it shows a certain degree of upgrade in terms of computing power, power consumption and cost performance.

The position of the three hashrate boards is fixed in parallel through the internal card slots.

After taking out one of the power boards separately, you can see that each power board carries 63 chips.

The surface of the circuit board is densely distributed with a block of heat sinks, which are distributed on both sides of the chip.

The location of the chip and the heat sink on the circuit board and the materials, height and thickness of the front and back of the heat sink are not the same, and the design has obviously undergone special differentiation treatment.
There is only one main and most fundamental reason for this design, which is to allow the air-cooled heat dissipation system to exert the greatest heat dissipation effect.

Specifications