Exactly they are a non bitmain company .
They made 51 chip boards vs 63 chips.
But the pcb board is the exact size as an Antminer board.
Here are some screen shots. showing a two board running. the gui mining status and the pool numbers.
this uses 616 watts. to do 11th. about 56-57 watts a th.
I need a lot more testing on this.
I will be making a you tube soon.
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FjoRnFLL.png&t=665&c=GQqBVRqPtKsrrQ)
since it is a non bitmain chip the freq range is different then the s9 chips.
low setting with tuning tries freq 450 with best volts/watts
pll option allows you to pick any freq from 450-570 and then try to tune for best efficient numbers
since my hope is building better space heaters I asked if I can go lower then freq 450 and use the pll tuning .
so I am trying 2 boards and pll freq 400 option.
hope to drop hash rate to 9-10th and power to 520-560
auto tuning takes more then 20 minutes
here is a nice feature temp of every chip.
look at middle board it is not connected in any way reads -99
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FfJ0fIoH.png&t=665&c=lfdj6kcauzPGhg)
freq set of 400 yields
watts at 531
hash at 10.31
only 51-52 watts a th
this is actually better then expected
looked pool side and I get
watts at 531
hash at 9.84 th
about 53-54 watts a th. this is what I expected to get.
I use this psu and volts supplied to it are 240
https://www.ebay.com/itm/HP-643956-201-1200W-HSTNS-PL30-Platinum-Plus-Hot-Plug-Power-Supply-643933-101/312798058602?My braiins gear does about 85 watts a th. I can set it lower then freq 400. so I can do 300 watts to 350 watts with a two board miner braiins. but far less efficient then this gear.
I will run this at freq 400 for a few more hours
I will drop to freq 350 to see if we can get lower watts and not lose efficiency.
It would be nice to go to 475 watts and 8.75 th. on freq 350.
here are freq 350 numbers.
the settings
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FmCePAil.png&t=665&c=4PYVs6DeSfhBaA)
the hash gui
note that fan sensor is weird I will replace fan to see if it goes away
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FXjJxwuX.png&t=665&c=wEQ-CSO6FMpQcA)
replaced fan. and get correct readings so fan had a bad tach wire.
looks like at freq 350 watts are steady at 463
and hash fluxes from 7700 to 8400. I am going to run over night to see if it gets a more stable hash rate.
I will also see viabtc long time avg
if it does 8000 at 463 it is 56-58 watts. if it does 8400 it is 54-55 watts
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FpX1s3sD.png&t=665&c=1Zeks9CAiXX7Kg)