Disclaimer: I received a SP20 from Spondoolies tech for review. Thanks Guy! This review is being written after 3days of use. The unit has been functioning as per expectations (hash-rate =
1.4TGH/s, pulling
800Watts at wall via a 1KW 80Plus gold PSU)
(All copyrights to the following images have been released; these can be freely used by anyone for whatever purpose they deem fit)
Meet the SP20 
Full-size Keyboard for scale 
The fan pulls cold air through this outlet over the heatsinks covering the Rockerbox ASIC chips.
There are 8chips inside this device.
Unboxing the SP20.
I like the
eco-friendly padding material. It does the job extremely well and is bio-degradable
Network Connectivity is via a standard ethernet cable.
Power delivery is through 4X PCIE 6-pin power cables, the standard ones that power GPUs.
Size comparison with an Antminer S3. The fan pushes hot air out through this outlet.
Detailed Review
It will take an average user no longer than 10 minutes after unpacking to get start mining on the SP20.
The miner when first connected to the LAN, uses DHCP to acquire a local IP address. It also sends data back to spondoolies tech so that the miner's IP address can be identified by going to
http://myminer.io
HTML web access to miner is via http://IPaddress of your miner
Username admin
Password: admin
ssh root@<IPaddress of your miner>
password:root
The fan on this miner is very
Loud (Loud is an understatement, esp. when compared to the whisper from the Antminer S3. The fan noise is similar to the noise from a small vacuum cleaner; similar to the noise heard in server rooms when the fans are running at full speed). The fan is loud at all settings from 20 to 80 fan speeds.
One can change the fan speed lower by ssh'ing into the miner and editing the config file.
IMO fan speed of
10 or lower has been tolerable for me in a home environment.
You can change the following file to lower the fan speed below 20.
FAN:
10 VS0:650 VS1:650 VS2:650 VS3:650 VMAX:700 AC0:288 AC1:288 AC2:288 AC3:288 DC_AMP:170
Here's a screenshot showing the hashing speed.
Note the lower fan speed (10)
The
voltage settings that I am using with the lower fan speeds
Inside the SP20
Removing the metal plate at the bottom. There are two holes cut-out for easy removal.
Hashing cards can slide out now
Controller board
ARM Cortex A8 CPU
Altera Cyclone iv FPGA
Power controller
Sliding out the board
Aluminum heatsink and copper plate.
The ASIC chip
Imprint of the die on the copper plate
Die and heatsink
Multi-phase switching regulator TPS40425
The power MOSFETs CSD95378BQ5MC
Back of the hashing board
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