Bitmain’s new 860TH/s liquid cooled rack mounted Bitcoin miner built alongside Hut 8

Hut
8
and
Bitmain
have
announced
the
launch
of
the
Antminer
U3S21EXPH,
an
ASIC
miner
featuring
direct
liquid-to-chip
cooling
within
a
U
form
factor.
Hut
8
plans
to
deploy
this
model
in
the
second
quarter
of
2025
through
a
hosting
agreement
that
could
expand
its
hashrate
under

management
to
approximately
33.5
exahash
per
second
(EH/s).

The
U3S21EXPH
marks
a
significant
development
in
ASIC
computing
by
integrating
cooling
technology
typically
used
in
high-performance
computing
data
centers.
This
miner
shifts
from
the
traditional
“shoebox”
design
to
a
rack-ready
U
form
factor,
allowing
deployment
densities
of
up
to
about
180
kilowatts
per
rack.
Hut
8
has
developed
a
custom
data
center
infrastructure
to
accommodate
this
new
hardware,
aiming
to
optimize
performance
and
efficiency.

Currently,
the
best-performing
miner
on
the
market
is
the

Bitmain
S21
Pro,
which
runs
at
234TH/s.
The
new
miner
is
over
three
times
more
powerful
and
3
J/TH
more
efficient.

Per
the
announcement,
the
partnership
between
Hut
8
and
Bitmain
extends
beyond
procurement.
The
companies
collaborated
on
both
technical
and
commercial
aspects,
with
Hut
8
contributing
to
the
miner’s
development.

The
hosting
agreement
features
a
fixed
hosting
fee
and
provides
Hut
8
with
an
option
to
purchase
all
or
part
of
the
hosted
machines
within
six
months
of
their
activation.
This
structure
is
designed
to
reduce
upfront
capital
requirements
and
allow
Hut
8
to
assess
market
conditions
before
committing
additional
funds.
If
Hut
8
exercises
this
option
fully,
its
self-mining
hashrate
could
increase
from
5.6
EH/s
to
approximately
20.6
EH/s.

Bitmain’s
Vice
President
of
Mining,
Irene
Gao,
acknowledged
Hut
8’s
role
in
the
development
process,
noting
the
company’s
focus
on
cost-efficient
procurement
and
operations.
The
collaboration
is
seen
as
a
natural
evolution
of
their
relationship,
aiming
to
define
the
future
of
mining
technology.

Hut
8’s
Chief
Executive
Officer,
Asher
Genoot,
emphasized
the
innovative
nature
of
the
hosting
agreement
and
its
benefits,
stating,

“Our
team
worked
closely
with
BITMAIN
to
implement
an
innovative
structure
to
commercialize
the
U3S21EXPH
before
it
became
available
to
the
broader
market.”

The
deployment
of
the
U3S21EXPH
and
the
associated
hosting
agreement
represent
a

strategic
move
for
Hut
8.
By
integrating
advanced
cooling
technologies
and
flexible
procurement
strategies,
the
company
seeks
to
enhance
its
operational
capabilities
and
financial
performance.

Mentioned
in
this
article